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Switching Network D (SND)
Siemens
Switching Network D (SND)
Contents 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 3 3.1 3.2 3.3 3.4 3.5
Overview Basic System Features Restrictions in V13T SND Configurations MML Commands for SND Output Masks for SND New LTG and LTG-Port Addressing Modified Connection ID in AMA Ticket Hardware Realization Rack and Frame Layout Module MATC Module MATM Module MUXC Module LILD Module OML920 Clock Distribution Architecture Interface MBD/SND Software Functions Test and Diagnostics Best Side Selection (BSS) Path Setup Cross Office Check (COC) Upgrade of SND
SN1127EU13SN_0001
3 4 5 6 10 12 20 24 25 26 42 43 44 48 52 57 60 65 66 67 70 72 72
1
Siemens
2
Switching Network D (SND)
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
1
Overview The innovations of EWSD PowerNode – system architecture and technology Up to 600.000 analog or ISDN basis access (BA) lines
Remote
SI E M ENS NI X DO RF
Multifunctional switchboards, Centrex attendant consoles, inquiry desks
Local DLU 2.000 subs.
V5.1
CP
LTG
IEM S N S E NI XDO R F
DLU
Via V5.1 or V5.2 interfaces Multilink access products V5.1
ISDN PA, n × 64 kbit/s ISDN Intelligent peripheral (IP)
2.000 subs.
V5.2
V5.2* up to 16 PCM30
LTG PA, trunks
S I EM EN S N I XDO R F
Remote switching unit for up to 50.000 subscribers
V5.1
UP to 240.000 digital trunks with CCS or CAS, or analog trunks via SC-MUX
DLU
LTG
RTI
RSU: 50.000 subs.
PA, V5.2, trunks
LTG
SN
100. Erl.
2.016
SC-MUX
Up to 1.500 CCS7 sign.-channels
HTI
LTG
PSM
SSNC
Packet and data networks
100. MSU/s 1.500 links
CCS7 high speed channel Operation and maintenance interface Q3, X.25, LAN
CP
4,0 MBHCA
EWSD innovations
Coordination processor DLU Digital line unit HTI Host time slot interchange LTG Line/trunk group PSM Packet server module RSU Remote switching unit RTI Remote time slot interchange SC-MUX Signal converter multiplexer SN Switching network SSNC Signaling system network control
Fig. 1 The EWSD powernode
The innovations of EWSD PowerNode – higher performance for network consolidation * Reduction of network hierarchies * Powerful nodes with remote units
Innovation
100.
240.
100.
SIEMENS
EWSD
1.500 600.
Today
SIEMENS
SIEM ENS
EWSD
EWSD SIEM ENS
EWSD
4,0 mio 2,7 mio
250.
254
6.500
25.6
60.
SN Erlang
SN ports
SIEM ENS
EWSD
BHCA
EWSD innovations
Subscriber lines
#7 #7 channels MSU/s
Fig. 2 Higher performance with powernode
SN1127EU13SN_0001
3
Siemens
1.1
Switching Network D (SND)
Basic System Features
The SND is a new switching network type for EWSD centra offices. It is part of EWSD Innovation and provides the following improvements: l
Connection of up to 2016 LTGs
l
Allow small configurations up to 63 LTGs
l
Non-blocking design with no path hunt required for single and multi channel connection (each path can be setup any time independent from all other paths)
l
Interworking with MBD only
l
Interworking with LTGA up to LTGN and RSU
l
Support of 128 kbit/s message channel
l
Speech path supervision
l
Better overall MTBF (number of HW faults per port(s))
l
Usable for small switches as well as large switches with a small (16 LTG) growth granularity.
While the old SN types are still in operation, customers have the option to equip new switches with an SND. SNA or SNB switching networks in existing switches may be replaced by SND on demand. A strong motivation might be to extend the switching periphery to more than 504 LTG. But also new smaller switches should be supplied with the new SND because of its additional features, innovative technology, and less space occupation. A message buffer of type MBD is required to connect an SND to the coordination processor CP. The SND switching principle is total new compared to SNB. In general it is a switching matrix (like a grid). The Close-structure (TSSST) is not applied any longer. The SND is fully duplicated for high availability. The SND consists of 2 types of frames: l
the Frame Switching Network MUltipleXer version A (F:SNMUXA) and
l
the Frame Switching Network Matrix (F:SNMAT).
Due to it’s position between the old environment and the new matrix it is possible to get more than one version in the future if the old environment will be modernized. Therefore it is named F:SNMUX version A. In a later F:SNMUX version B an optolink LTG-SND shall reduce the costs of EWSD internal cabling by replacing 16 SDCinterfaces by an optical fiber. In the F:SNMUXA there is a multiplexer and demultiplexer for the existing environment which concentrates 2 x 64 x 8.192 Mbit/s LTG lines to 2 optical links which are connected to the F:SNMAT. In the F:SNMAT the switching is performed. For smaller switches (up to 252 LTGs) the F:SNMUXA is able to be a switch as well.
4
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
MBDH LTG 0-1
.. .
0
LTG 0-63
SNMUX 0
MBDH
.. .
LTG 1-1 127
LTG 1-63
8 Mbit/s SDC interface
.. .
920 Mbit/s optical link
0
920 Mbit/s optical link
1
1 x MBD-S3 (at SN126 LTG)
MBDH LTG 30-1
.. .
0
LTG 30-63
SNMUX 15
MBDH
.. .
LTG 31-1 127
LTG 31-63
.. .. ..
920 Mbit/s optical link
30
920 Mbit/s optical link
31
2 x MBD-S1
SNMAT
1 x MBD-S3 MBD CP
Fig. 3 SND basic system block diagram
1.2
Restrictions in V13T
l
In version V13T, the maximum number of 2016 LTGs at SN D is not released to customers; it is restricted to 1008 LTGs. Numbers higher than 1008 will be used for internal test purpose. The full range of 2016 LTGs at SN D is released in a later version, e.g. in V15.
l
The number of trunks has been increased from 65534 by factor 4 to 131070 (1008 LTGs) respectively 262140 (2016 LTGs). The number of trunks per trunk group as well as the number of trunk groups per exchange, trunk group number (TGNO), line number (LNO), circuit identification code (CIC), announcement lines and groups are not extended in V13T.
l
In version V13T no DLUs and V5IFs can be connected to LTGs with numbers higher than LTG = 7-63 i.e. internal numbers higher than 511. That means, that no subscribers and PBX lines can be created at the new high equipment numbers. No functions related to subscribers, for example packet data, are possible at the high LTG numbers.
SN1127EU13SN_0001
5
Siemens
Switching Network D (SND)
l
In version V13T only LTG types needed in trunk exchanges (i.e. LTGC and LTGD) can be connected to LTGs with higher number than LTG = 7-63, i.e. no LTGA, LTGH or other types for local exchanges.
l
In version V13T ports needed for operator consoles (OSS and ADMOSS) cannot be created at LTGs with higher numbers than LTG = 7-63 .
l
In V13T no wake up ports can be created at LTG with higher number than LTG = 7-63.
l
No CCNC is possible together with SND and large LTG numbers.
l
In a combined exchange with V13T (trunks and subscribers) not all objects can be measured by traffic measurement.
l
No test of trunks with ATME is possible for trunks connected to LTGs with higher number than LTG = 7-63.
l
No charging functions, which need tariff switchover in LTGs higher than 7-63 should be done in V13T exchanges. Accuracy of tariff switchover is not guaranteed for those high LTG numbers.
l
No multichanel switching for nx64 kbit/s (n<30) yet.
1.3
SND Configurations
Depending on the current capacity stage, only the F:SNMUXA is used for up to 252 LTGs (up to 2 F:SNMUXA), or the F:SNMUXA and the F:SNMAT are used (up to 16 F:SNMUXA and 1 F:SNMAT for up to 2016 LTGs). The modules of a F:SNMUXA are: M:LILD: Link interface module LTG type D The M:LILD is the interface to the LTG and MBDH (MCH interface). It is responsible for propagation time equalization of the SDC:LTG. It merges 16 SDC inputs of 8 Mbit/s to one high speed link with 184,32 Mbit/s. The reason for the additional bitrate is explained later. M:MUXC: Multiplex control module The M:MUXC receives/transmits the 184,32 Mbit/s highway data to/from the M:LDID modules depending on the system configuration: l
to/from the M:LILD in a system configuration of < 126 LTGs
l
to/from a second F:SNMUX(A) via M:OML920 in a system configuration of > 126 LTGs and <252 LTGs
l
to/from a F:SNMAT via M:OML920 in a system configuration of > 252 LTGs
The M:MUXC controls the 8 M:LILD and 2 M:OML920 over HDLC-links of 2 Mbit/s.
6
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
0 MBDH 1
...
LILD 0
64
LTG
127
. .MBDH . LTG
LILD 7
MUXC
SNMUX
Fig. 4 SND configurations for up to 126 LTG
The main switching network SND (EWSD) consists in its bigger expansion stages of two parts called SNMUX and SNMAT. The optical link module OML920 provides the data connection between these two parts. In a smaller expansion stage the SND consists of two SNMUX which are directly connected by the OML920. M:OML920: Optical Multiplexer Link module for a serial data rate of 920Mbit/s The optical multiplexer link module OML920 is a transparent transceiver backplane module. Four electrical data streams with 184.32 Mbit/s each are transmitted from one OML920 module to another OML920 module by an optical fiber. It provides a bidirectional data connection with a fiber length up to 200m. Growth is possible, gradually with different impact on the service. LILD can be added without service impact as long as there are free slots in an SNMUX. An SNMUX can be added without service impact, but the limit for each DE type is shown in the table below. Crossing the border of a DE type is achieved by a sort of APS changeover. The modification of the DE type can only be done in an installation recovery in the split system half.
SN1127EU13SN_0001
7
Siemens
max # of
Switching Network D (SND)
DE TYPE
max # of max # of # of SNMUX LILD MATM
max # of MBDH
252
DE6.0
2
16
0
1
252
DE6.1 *)
2
16
1
1
504
DE6.2
4
32
2
2
756
DE6.3
6
48
3
3
1,008
DE6.4
8
64
4
4
1,260
DE6.5
10
80
5
5
1,512
DE6.6
12
96
6
6
1,764
DE6.7
14
112
7
7
2,016
DE6.8
16
128
8
8
LTGs
*) DE6.0 should be taken instead of DE6.1, because with no MATM and no MATC it is the cheaper solution.
0
LTG
1
...
MBDH
... LTG
64
LILD 0 OML920
.
MBDH
0
LILD 7 OML920
127
1
MUXC1
SNMUX 0 0
LTG
1
...
MBDH
... LTG
LILD 0 OML920
.
MBDH
64
LILD 7
127
MUXC
0 OML920 1
SNMUX 1 SND configuration up to 252 LTG Fig. 5 SND configurations for up to 256 LTG
8
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
Up to 16 F:SNMUX can be connected to a frame F:SNMAT. The modules of a F:SNMAT are: M:MATM Matrix module In F:SNMAT the switching matrix is made of 8 M:MATM for enlargement in linear equal steps. Each module contains a switch 128 inputs to 16 outputs. 8 modules combined forms a switch with 128 inputs to 128 outputs (128 # 128, that sign # means a matrix) where each input is connected onto each module which is an important realization detail of the matrix. 8 modules with 16 outputs each are the required 128 outputs. In each crossing point of the matrix there is a Time Stage Circuit realized for 32 inputs by the ASIC TSC32 which contains a space stage 32 # 4 as well. Each M:MATM module contains ASICs for equalization memories, which have no switching functionality but they are necessary to align all incoming signals from op to 16 F:SNMUXA with different locations and cable length between 0 and 200 meters. M:MATC Matrix control module The controller M:MATC performs the preprocessing for the path setup commands received from CP via the MBD-interface and distributes the information to the controllers on the modules M:MATM via a 2 Mbit/s HDLC link. The clock generator and 5 V power supply for the entire frame are located also on M:MATC.
0
LTG
1
... MBDH ... LTG
LILD 0 OML920
OML920
0
64
LILD 7
127
MUXC
OML920
MATM 0 OML920
1
...
MBDH
...
SNMUX 0
MBDH
0
LTG
1
... MBDH ... LTG
MATM 7
LILD 0 OML920
OML920
0
64
LILD 7
127
MUXC
OML920
SNMUX 15
1
OML920 MATC SNMAT
Fig. 6 SND configurations for up to 2016 LTG
SN1127EU13SN_0001
9
Siemens
1.4
Switching Network D (SND)
MML Commands for SND
For the SND a few MML commands have been introduced, some have changed and a small number is no longer needed. The MML configurable logical units of the SND are SN, SNMAT. The configurable physical units are MATC, MATM and SNMUX. The logical objects SN and SNMAT are introduced to simplify the execution of maintenance functions. By these objects a collective set of hardware equipment can be addressed within one maintenance command. The physical units MATC, MATM, SNMUX represent the hardware objects being really configured, alarmed and repaired. They can consist of more than one board or hardware equipment assigned (e.g. SNMUX consist of MUXC, LILDs, OML assigned to the SNMUX). For alarming of the new units there are 3 new objects classes introduced:
10
l
MATC
l
MATM
l
SNMUX
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
The following MML commands have been introduced for SND: l
to expand in steps of 252 LTGs (only in installation recovery):
ENTR EXDDAT:
DETYPE=...;
As SND introduces additional values for DETYPE in EWSD V13T the new values DE60, DE61, DE62, DE63, DE64, DE65, DE66, DE67 and DE68 are added in parameter DETYPE of MML-command ENTR EXDDAT. l
to expand and to modify alarm profile for components MATC, MATM, SNMUX:
MOD SNDAT:
SN=..., [ALPROF=...,] [LTGMAX=0...126,] UNIT= TSG-0...7 or SNMUX-0...15 or MATC or MATM-0...7 or X
This command also replaces the old command MOD TSG. l
to display Alarm Profile for all SND units, DE Type, max. MATM, max:
DISP SNDAT: SN=...;
SN SNMAT
SNMUX 0 MATM 0
SNMUX 1
· SNMUX 15
configurable physical unit
· MATM 7
MATC
configurable logical unit
Fig. 7 Logical and physical units of SND
SN1127EU13SN_0001
11
Siemens
l
Switching Network D (SND)
to configure MATC, MATM together, otherwise single commands:
When this command, the physical units MATC and MATM must have the same current state or some units may have already the desired state, otherwise the command will be rejected. CONF SNMAT: SN=..., OST=...; l
to diagnose MATC, MATM together, otherwise (time expensive) single:
DIAG SNMAT: l
SN=...;
to configure/diagnose MATC:
CONF MATC:
SN=...,MATC=..., OST=...;
DIAG MATC:
SN=...,MATC=...;
l
to configure/diagnose MATM:
CONF MATM:
SN=..., MATM=..., OST=...;
DIAG MATM:
SN=...,MATM=...;
l
to configure/diagnose SNMUX:
CONF SNMUX: SN=..., SNMUX=..., OST=...; DIAG SNMUX: l
SN=..., SNMUX=..., TA= HWC or LOOPT;
to configure SN:
In case of SND a new path of command CONF SN may be used to specify the SN side for the selection of speech channels. The user may specify side 0, side 1, or best side selection BSS (selection will be done by software). CONF SN:
1.5
SN=..., SPCHSIDE= 0 or 1 or BSS;
Output Masks for SND
1.5.1
Display of Exchange Description Data
T53/0000530_530/DBPXEK0V2440-PC1/013 0362 OMT-01/REM#1 2992/01952 DISPEXDDAT;
99-08-12
13:12:31 EXEC'D
EXCHANGE DESCRIPTION DATA CNTRY GNTYPE DETYPE MET Q3ACTIVE ENTITY CMYSIZE CONFIG -------+----------+-------+----------+---------+-------+--------+------BRD DE64 YES 256 CPMP END JOB 0362
12
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
1.5.2
Display of SN Data
T53/0000530_530/DBPXEK0V2440-PC1/013 0945 OMT-01/REM#1 3102/09664
99-08-12
13:13:36
99-08-11
14:03:01
DISPSNDAT; SN-TYPE: SND SN UNIT LTGMAX ALPROF ALSTAT ----+--------+-------+--------+------0 MATC MAJESC 0 MATM - 0 MAJESC 0 MATM - 1 MAJESC 0 MATM - 2 MAJESC 0 MATM - 3 MAJESC 0 SNMUX- 0 128 MAJESC ALOUTS 0 SNMUX- 1 128 MAJESC 0 SNMUX- 2 128 MAJESC 0 SNMUX- 3 128 MAJESC 0 SNMUX- 4 128 MAJESC 0 SNMUX- 5 128 MAJESC ALOUTS 0 SNMUX- 6 128 MAJESC ALOUTS 0 SNMUX- 7 128 MAJESC 1 MATC MAJESC 1 MATM - 0 MAJESC 1 MATM - 1 MAJESC 1 MATM - 2 MAJESC 1 MATM - 3 MAJESC 1 SNMUX- 0 128 MAJESC 1 SNMUX- 1 128 MAJESC ALOUTS 1 SNMUX- 2 128 MAJESC 1 SNMUX- 3 128 MAJESC 1 SNMUX- 4 128 MAJESC 1 SNMUX- 5 128 MAJESC ALOUTS 1 SNMUX- 6 128 MAJESC 1 SNMUX- 7 128 MAJESC END JOB 0945 EXEC'D
1.5.3
Status of SN
T53/DBPXEK0V2440-000/203 0388 OMT-00/REM#0
3080/09683
STATSN;
EXEC'D
THE LTGS SELECT SPEECH CHANNELS FROM SN SN UNIT
-0
LTG SET MB UNIT FROM TO -------------+-----+--------------+--------------+----------MATC -0 ACT MATM -0 -0 ACT MATM -0 -1 ACT MATM -0 -2 ACT MATM -0 -3 ACT
SN1127EU13SN_0001
OST
13
Siemens
Switching Network D (SND)
SNMUX-0 -0
ACT
SNMUX-0 -1
ACT
SNMUX-0 -2
ACT
SNMUX-0 -3
ACT
SNMUX-0 -4
ACT
SNMUX-0 -5
ACT
SNMUX-0 -6
PLA
SNMUX-0 -7
ACT
MATC -1 MATM -1 MATM -1 MATM -1 MATM -1 SNMUX-1
-0 -1 -2 -3 -0
STB STB STB STB STB STB
SNMUX-1 -1
STB
SNMUX-1 -2
STB
SNMUX-1 -3
STB
SNMUX-1 -4
STB
SNMUX-1 -5
STB
SNMUX-1 -6
ACT
SNMUX-1 -7
STB
LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG
-0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15
-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG
-0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15
-63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63
MBIH -0 -0
LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG
-0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15
-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG
-0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15
-63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63
MBIH -1 -0
MBIH -0 -1
MBIH -0 -2
MBIH -0 -3
MBIH -1 -1
MBIH -1 -2
MBIH -1 -3
END JOB 0388 DISPEXDDAT;
EXEC'D
EXCHANGE DESCRIPTION DATA CNTRY GNTYPE DETYPE MET Q3ACTIVE ENTITY CMYSIZE CONFIG -------+----------+-------+----------+---------+-------+--------+------DE60 YES CPMP END JOB 0281 STATSN;
EXEC'D
THE LTGS SELECT SPEECH CHANNELS FROM SN SN UNIT
-0
LTG SET MB UNIT FROM TO -------------+-----+--------------+--------------+----------SNMUX-0 -0 ACT LTG -0 -1 LTG -0 -63 MBIH -0 -0
14
OST
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
SNMUX-0 -1
ACT
SNMUX-1 -0
STB
SNMUX-1 -1
STB
LTG LTG LTG LTG LTG LTG LTG
-1 -2 -3 -0 -1 -2 -3
-1 -1 -1 -1 -1 -1 -1
LTG LTG LTG LTG LTG LTG LTG
-1 -2 -3 -0 -1 -2 -3
-63 -63 -63 -63 -63 -63 -63
MBIH -1 -0
END JOB 0282
1.5.4
Status of LTGs
T53/DBPXEK0V2440-000/203 0383 OMT-00/REM#0
3080/09682
99-08-11
STATLTG:LTG=14; LTG OST CH0 CH1 -----------------14 -1 PLA 14 -4 PLA 14 -7 PLA 14 -10 PLA 14 -13 PLA 14 -16 PLA 14 -19 PLA 14 -22 PLA 14 -25 PLA 14 -28 PLA 14 -31 PLA 14 -34 PLA 14 -37 PLA 14 -40 PLA 14 -43 PLA 14 -46 PLA 14 -49 PLA 14 -52 PLA 14 -55 PLA 14 -58 PLA 14 -61 PLA
EXEC'D LTG OST CH0 CH1 -----------------14 -2 PLA 14 -5 PLA 14 -8 PLA 14 -11 PLA 14 -14 PLA 14 -17 PLA 14 -20 PLA 14 -23 PLA 14 -26 PLA 14 -29 PLA 14 -32 PLA 14 -35 PLA 14 -38 PLA 14 -41 PLA 14 -44 PLA 14 -47 PLA 14 -50 PLA 14 -53 PLA 14 -56 PLA 14 -59 PLA 14 -62 PLA
END JOB 0383 T53/DBPXEK0V2440-000/203 0293 OMT-00/REM#0
LTG OST CH0 CH1 -----------------14 -3 PLA 14 -6 PLA 14 -9 PLA 14 -12 PLA 14 -15 PLA 14 -18 PLA 14 -21 PLA 14 -24 PLA 14 -27 PLA 14 -30 PLA 14 -33 PLA 14 -36 PLA 14 -39 PLA 14 -42 PLA 14 -45 PLA 14 -48 UNA UNA UNA 14 -51 PLA 14 -54 PLA 14 -57 PLA 14 -60 PLA 14 -63 PLA
3080/09682
99-08-12
STATLTG:LTG=X; LTG OST CH0 CH1 -----------------0 -1 PLA 0 -4 ACT NAC ACT 0 -7 ACT NAC ACT 0 -10 PLA 0 -13 SEZ SEZ UNA 0 -16 SEZ SEZ UNA 0 -19 SEZ SEZ UNA 0 -22 PLA 0 -25 ACT NAC ACT
SN1127EU13SN_0001
13:57:31
09:09:12 EXEC'D
LTG OST CH0 CH1 -----------------0 -2 PLA 0 -5 ACT NAC ACT 0 -8 SEZ SEZ UNA 0 -11 PLA 0 -14 SEZ SEZ UNA 0 -17 SEZ SEZ UNA 0 -20 ACT NAC ACT 0 -23 ACT NAC ACT 0 -26 ACT NAC ACT
LTG OST CH0 CH1 -----------------0 -3 ACT NAC ACT 0 -6 ACT NAC ACT 0 -9 PLA 0 -12 PLA 0 -15 SEZ SEZ UNA 0 -18 SEZ SEZ UNA 0 -21 PLA 0 -24 ACT NAC ACT 0 -27 PLA
15
Siemens
0 0 0 0 0 0 0 0 0 0 0 0
-28 -31 -34 -37 -40 -43 -46 -49 -52 -55 -58 -61
Switching Network D (SND)
ACT PLA PLA ACT ACT PLA ACT ACT PLA ACT ACT ACT
NAC ACT NAC ACT NAC ACT NAC ACT NAC ACT NAC ACT NAC ACT NAC ACT
0 0 0 0 0 0 0 0 0 0 0 0
-29 -32 -35 -38 -41 -44 -47 -50 -53 -56 -59 -62
ACT PLA ACT PLA PLA ACT SEZ PLA ACT ACT PLA PLA
NAC ACT NAC ACT NAC ACT SEZ UNA NAC ACT NAC ACT
0 0 0 0 0 0 0 0 0 0 0 0
-30 -33 -36 -39 -42 -45 -48 -51 -54 -57 -60 -63
ACT ACT PLA PLA PLA PLA MBL PLA PLA PLA MBL ACT
NAC ACT NAC ACT
UNA UNA
UNA UNA NAC ACT
END TEXT JOB 0293 T53/DBPXEK0V2440-000/203 0293 OMT-00/REM#0
3080/09682
99-08-12
STATLTG:LTG=X; LTG OST CH0 CH1 -----------------2 -1 ACT NAC ACT 2 -4 PLA 2 -7 PLA 2 -10 PLA 2 -13 PLA 2 -16 PLA 2 -19 PLA 2 -22 PLA 2 -25 PLA 2 -28 PLA 2 -31 ACT NAC ACT 2 -34 PLA 2 -37 PLA 2 -40 PLA 2 -43 PLA 2 -46 PLA 2 -49 PLA 2 -52 PLA ... END TEXT JOB 0293
1.5.5
09:09:17 EXEC'D
LTG OST CH0 CH1 -----------------2 -2 PLA 2 -5 PLA 2 -8 PLA 2 -11 PLA 2 -14 PLA 2 -17 PLA 2 -20 PLA 2 -23 PLA 2 -26 PLA 2 -29 PLA 2 -32 PLA 2 -35 PLA 2 -38 PLA 2 -41 PLA 2 -44 PLA 2 -47 PLA 2 -50 PLA 2 -53 PLA
LTG OST CH0 CH1 -----------------2 -3 PLA 2 -6 PLA 2 -9 PLA 2 -12 PLA 2 -15 PLA 2 -18 PLA 2 -21 PLA 2 -24 PLA 2 -27 PLA 2 -30 PLA 2 -33 PLA 2 -36 PLA 2 -39 PLA 2 -42 PLA 2 -45 PLA 2 -48 PLA 2 -51 PLA 2 -54 PLA
Configuration of SNMUX
T53/DBPXEK0V2440-000/203 0169 OMT-00/REM#0
3077/06611
99-08-11
CONFSNMUX:SN=1,SNMUX=6,OST=ACT; STARTING CONFIGURATION FOR SNMUX-1
15:39:28 ACCEPTED
-6
FROM MBL TO ACT
END TEXT JOB 0169 T53/DBPXEK0V2440-000/203 0169 OMT-00/REM#0 CONFSNMUX:SN=1,SNMUX=6,OST=ACT;
16
3076/06609
99-08-11
15:43:07 EXEC'D
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
END OF CONFIGURATION FOR SNMUX-1
-6
FROM MBL TO ACT
END TEXT JOB 0169 T53/DBPXEK0V2440-000/203 0169 OMT-00/REM#0
3076/00007
99-08-11
CONFSNMUX:SN=1,SNMUX=6,OST=ACT;
15:43:08 EXEC'D
END JOB 0169
1.5.6
Configuration of MATC
T53/DBPXEK0V2440-000/203 0268 OMT-00/REM#0
3077/06611
99-08-11
CONFMATC:MATC=1,OST=MBL; STARTING CONFIGURATION FOR MATC -1
15:56:14 ACCEPTED
FROM ACT TO MBL
END TEXT JOB 0268 T53/DBPXEK0V2440-000/203 0268 OMT-00/REM#0
3078/09199
99-08-11
CONFMATC:MATC=1,OST=MBL;
15:56:53 WAITING
CAUTION: THIS REQUEST END TEXT JOB 0268 0268 DO YOU WANT THIS CONFIGURATION TO BE EXECUTED ?
MASKNO:12467
(YES: +/NO: -) < + T53/DBPXEK0V2440-000/203 0268 OMT-00/REM#0
3076/06609
99-08-11
CONFMATC:MATC=1,OST=MBL; END OF CONFIGURATION FOR MATC -1
15:57:01 EXEC'D
FROM ACT TO MBL
END TEXT JOB 0268 T53/DBPXEK0V2440-000/203 0268 OMT-00/REM#0 CONFMATC:MATC=1,OST=MBL; END JOB 0268
SN1127EU13SN_0001
3076/00007
99-08-11
15:57:02 EXEC'D
17
Siemens
Switching Network D (SND)
T53/DBPXEK0V2440-000/203 0271 OMT-00/REM#0
3080/09683
99-08-11
STATSN;
EXEC'D
THE LTGS SELECT SPEECH CHANNELS FROM SN SN UNIT
15:57:17
-0
OST
LTG SET MB UNIT FROM TO -------------+-----+--------------+--------------+----------MATC -0 ACT MATM -0 -0 ACT MATM -0 -1 ACT MATM -0 -2 ACT MATM -0 -3 ACT SNMUX-0 -0 ACT LTG -0 -1 LTG -0 -63 MBIH -0 -0 LTG -1 -1 LTG -1 -63 SNMUX-0 -1 ACT LTG -2 -1 LTG -2 -63 LTG -3 -1 LTG -3 -63 SNMUX-0 -2 ACT LTG -4 -1 LTG -4 -63 MBIH -0 -1 LTG -5 -1 LTG -5 -63 SNMUX-0 -3 ACT LTG -6 -1 LTG -6 -63 LTG -7 -1 LTG -7 -63 SNMUX-0 -4 ACT LTG -8 -1 LTG -8 -63 MBIH -0 -2 LTG -9 -1 LTG -9 -63 SNMUX-0 -5 ACT LTG -10 -1 LTG -10 -63 LTG -11 -1 LTG -11 -63 SNMUX-0 -6 DST LTG -12 -1 LTG -12 -63 MBIH -0 -3 LTG -13 -1 LTG -13 -63 SNMUX-0 -7 ACT LTG -14 -1 LTG -14 -63 LTG -15 -1 LTG -15 -63 MATC -1 MBL MATM -1 -0 NAC MATM -1 -1 NAC MATM -1 -2 NAC MATM -1 -3 NAC SNMUX-1 -0 STB LTG -0 -1 LTG -0 -63 MBIH -1 -0 LTG -1 -1 LTG -1 -63 SNMUX-1 -1 STB LTG -2 -1 LTG -2 -63 LTG -3 -1 LTG -3 -63 SNMUX-1 -2 STB LTG -4 -1 LTG -4 -63 MBIH -1 -1 LTG -5 -1 LTG -5 -63 SNMUX-1 -3 STB LTG -6 -1 LTG -6 -63 LTG -7 -1 LTG -7 -63 SNMUX-1 -4 STB LTG -8 -1 LTG -8 -63 MBIH -1 -2 LTG -9 -1 LTG -9 -63 SNMUX-1 -5 STB LTG -10 -1 LTG -10 -63 LTG -11 -1 LTG -11 -63 SNMUX-1 -6 ACT LTG -12 -1 LTG -12 -63 MBIH -1 -3 LTG -13 -1 LTG -13 -63 SNMUX-1 -7 STB LTG -14 -1 LTG -14 -63 LTG -15 -1 LTG -15 -63 END JOB 0271
18
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
1.5.7
Configuration of SN
T53/DBPXEK0V2440-000/203 0173 OMT-00/REM#0
3077/00006
99-08-11
CONFSN:SPCHSIDE=1;
15:45:49 STARTED
END TEXT JOB 0173 T53/DBPXEK0V2440-000/203 0173 OMT-00/REM#0
3076/00007
99-08-11
CONFSN:SPCHSIDE=1;
15:45:55 EXEC'D
END JOB 0173 T53/DBPXEK0V2440-000/203 0175 OMT-00/REM#0
3080/09683
99-08-11
STATSN;
EXEC'D
THE LTGS SELECT SPEECH CHANNELS FROM SN SN UNIT
15:46:16
-1
LTG SET MB UNIT FROM TO -------------+-----+--------------+--------------+----------MATC -0 STB MATM -0 -0 STB MATM -0 -1 STB MATM -0 -2 STB MATM -0 -3 STB SNMUX-0 -0 STB LTG -0 -1 LTG -0 -63 MBIH -0 -0 LTG -1 -1 LTG -1 -63 SNMUX-0 -1 STB LTG -2 -1 LTG -2 -63 LTG -3 -1 LTG -3 -63 SNMUX-0 -2 STB LTG -4 -1 LTG -4 -63 MBIH -0 -1 LTG -5 -1 LTG -5 -63 SNMUX-0 -3 STB LTG -6 -1 LTG -6 -63 LTG -7 -1 LTG -7 -63 SNMUX-0 -4 STB LTG -8 -1 LTG -8 -63 MBIH -0 -2 LTG -9 -1 LTG -9 -63 SNMUX-0 -5 STB LTG -10 -1 LTG -10 -63 LTG -11 -1 LTG -11 -63 SNMUX-0 -6 DST LTG -12 -1 LTG -12 -63 MBIH -0 -3 LTG -13 -1 LTG -13 -63 SNMUX-0 -7 STB LTG -14 -1 LTG -14 -63 LTG -15 -1 LTG -15 -63 MATC -1 ACT MATM -1 -0 ACT MATM -1 -1 ACT MATM -1 -2 ACT ... END JOB 0175
SN1127EU13SN_0001
OST
19
Siemens
1.6
Switching Network D (SND)
New LTG and LTG-Port Addressing
With introduction of new switching network SN D, it is possible to enlarge the number of LTGs in an exchange from 504 in EWSD classic up to 2016 (later 8064 LTGs are planned with another new SN) within EWSD PowerNode. The number of DLUs and V5IFs will grow with a similar factor. This enlargement makes it necessary to address the higher number of HW units and the located ports internally and by operators via MML. The existing address mechanisms are limited to 504 LTG (addressed with TSG 0...7 and LTG 1..63 per TSG), 255 DLUs and 3000 V5 interfaces. Equipment numbers of the ports can be addressed in existing versions only to the same extension. Therefore an enhancement for numbering/addressing for all types of ports has to be done. In V13T the enhanced addressing is only realized for LTGs and LTG ports to be able to deliver large trunk switches. It’s also planned to connect subscribers in this switch, but the DLUs, OSS and V5 interfaces will be connected to the first 504 LTGs and so it’s not necessary to change the addresses for these units in V13T. In a later version, a synonymous step is done for DLU, OSS and V5.x interfaces for large subscriber exchanges. For V13T only an amount of 1008 LTGs will be released to the customer, because no dynamical optimization is done for this version. But for this version it is already possible to create HW-units and trunks, in all 2016 LTG’s. The addressing scheme at MML interface is changed , instead of one parameter EQN for equipment number two parameters are used. The existing numeric values of the parameter units are kept. For example, ports with EQN = 1- 2- 3- 4 at existing LTG = 1-2 with internal number 66 at SN B keeps this external and internal number in V13T at SN D. However, the input of LTG has to be done within an other MML parameter. This new LTG - addressing scheme is introduced for all types of exchanges in V13T.
20
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
Old Format of parameter LTG/PLF:
New Format of parameter LTG/PLF:
LTG = tsg - ltg PLF = tsg - ltg
LTG = ltgset - ltg PLF = ltgset - ltg
where
where tsg: 0...7 ltg: 1...63
ltgset: 0...31 ltg: 1...63
Fig. 8 Format of MML parameter LTG / PLF
Old Format of parameter EQN:
New Format of parameter LTG and LC:
EQN = tsg - ltg - ltu - channel where tsg: 0...7 ltg: 1...63 ltu: 0...7 channel: 0...31
LTG = where
ltgset - ltg, LC = ltu - channel ltgset: ltg: ltu: channel:
0...31 1...63 0...7 0...31
Fig. 9 Format of MML parameter EQN
Old Format of parameter PDCLNK:
New Format of parameter LTG and PDCLNK :
PDCLNK = tsg - ltg - ltu or dlu - slmx - id - pcm where tsg: 0...7 ltg: 1...63 ltu: 0...4 dlu: 10...2550 slmx-id: 0...15 pcm: 0...1
LTG = ltgset - ltg, PDCLNK = ltu or DLU = dlu, PDCLNK = slmx_id - pcm where ltgset: 0...31 ltg: 1...63 ltu: 0...4 dlu: 10...2550 slmx-id: 0...15 pcm: 0...1
Fig. 10 Format of MML parameter PDCLNK
SN1127EU13SN_0001
21
Siemens
Switching Network D (SND)
New Parameters for LTG Ports The old output format of EQN is changed in the new output format LTG and LC. For all outputs which includes the parameter PDCLNK a new parameter EQT which describes the type (LTG or DLU) is inserted. The old output length of LTG / PLF number is enlarged by 2 digits. LTG
LINE TRUNK GROUP This parameter only accepts a single value entry. a-b a: LINE TRUNK GROUP SET 0...31, range of decimal numbers Dependent on the Switching Network Hardware this unit represents the Time Stage Group (TSG for SNB) or the Switching Network MULTIPLEXER (SNMUX for SND and upper ones). b: LINE TRUNK GROUP NUMBER 1...63, range of decimal numbers
LC
LINE CONNECTION This parameter only accepts a single value entry. a-b a: LINE TRUNK UNIT 0...7, range of decimal numbers b: CHANNEL 0...31, range of decimal numbers
22
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
LTG 0-1
0 1
0 - 63
63 64 65
...
1-1
...
SNMUX 0
126
1 - 63
...
0 1
30 - 1
SN D
15
63 64 65
30 - 63 31 - 1
126
31 - 63
MBDH 7 MBU:LTG
0 - 28
MBU:LTG
0 - 29
... MBDH 0 MBU:LTG
0-0
MBU:LTG
0-1
MBU:LTG
0-2
MBU:LTG
0 - 30
MBU:LTG
0 - 31
MBD
MBU:LTG
0-3
Fig. 11 LTG configuration with SN(D) DE6/8 (up to 2016 LTGs)
All MML-commands and output masks which include the parameters LTG and EQN for LTG-HW units and trunks are changed to a new format. The units which are not needed in trunk exchanges (e.g. (CTX-)subscribers, PA/BA, V5IF, OSS, ...) still remain in the old format and will be changed in later version. For version V13T these units only can be connected to the first 504 LTGs. The following objects have changed MML commands: LTG and sub-units (CR, LTU, TOG, COU, PH ...) LTG, LTU, CRMOD, MDTOG, CONFL, CONFRNC, COU Trunks, Announcements, ... GTCPT, GTDEST, NUC, OCANEQ, OCAVAR, PDCLNK, PORT, ROUDB, TRUNK, FHM, PDCCHR, PDCCNTL, PDCPERF, PHONMEET
SN1127EU13SN_0001
23
Siemens
Switching Network D (SND)
Testequipment CTYPE, EQTRAP, LCVAR, TRAPS, TSTCALL, TSTOBJ Fault Analysis, Traffic measurement, Utilities and Tracer CALLDAT, CALLMON, CALLTRAC, CLSTTRAC, CONN, CSF, ERRSTDAT, GP, GPELEM, LTGIMDMP, LTGPRPCH, LTGRES, OVLD, SIGNTRAC There are a lot of output masks for Recoveries, Alarming, Audits, ... which also includes the LTG or EQN number. They are enhanced due to increase of LTG numbers.
1.7
Modified Connection ID in AMA Ticket
The connection ID is a unique identification of one call, that means: l
at one point of time, all different calls in one exchange have a different connection ID.
l
all tickets for one call (AMA tickets, MOB tickets, IACAMA tickets and IN AMA tickets) get the same connection ID.
l
It is guaranteed that the same Connection Id will not appear again after at least 5 days in version 12. This estimation is based on the highest possible traffic in EWSD. In case of normal traffic, the same Connection Id will appear again after a much longer period.
The current connection ID has the following structure (part of the current data package 25): length (bits)
Content
9
LTG number (or zero if built by CP)
23
GP-counter / CP-counter
The total length of the connection ID is not changed. As the range of LTG number is now 1-2047 ,the counter is reduced to 21 bit. Reducing the counter by two bits means that the connection ID can return faster. e.g. instead of 5 days it would be possible that the connection id number returns the next day.
24
SN1127EU13SN_0001
Switching Network D (SND)
2
Siemens
Hardware Realization
Fig. 12
SN1127EU13SN_0001
25
Siemens
2.1
Switching Network D (SND)
Rack and Frame Layout
Each field represents a frame and each column represents a rack. Max. 4 free fields may be filled with LTGs, MBUs, CCGs and so on.
F:SNMUXA 0 F:SNMUXA 1
Fig. 13 SND 126 LTGs: 2 frames
26
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
F:SNMUXA 0
F:SNMUXA 0
F:SNMUXA 1
F:SNMUXA 1
Fig. 14 SND 252 LTGs: 2 frames
0
1
2
F:SNMUXA 0
F:SNMUXA 0
F:SNMUXA 0
F:SNMUXA 1
F:SNMUXA 1
F:SNMUXA 1
15
...
F:SNMUXA 0
FAN-TRAY
F:SNMUXA 1
F:SNMAT 0 F:SNMAT 1 F:AUB-C F:CU-C FAN-BOX
Fig. 15 SND 2016 LTGs: 34 frames
SN1127EU13SN_0001
27
Siemens
Switching Network D (SND)
Retrofit means the replacement of an old SNA or SNB by a new SND. The major reason of distributing the SND over multiple frames is the maximum amount of cables (approx. 200) to be fed into an EWSD rack. In case of an enlargement of an existing SN up to 504 LTGs, various old existing LTG versions have to be connected and also the more compact LTGN might be used to fill up the required number of LTGs. For small SNDs (up to 252 LTGs) no F:SNMAT frame is necessary. The old TSGB frames of an SNB can be replaced by a F:SNMUXA frame witch is able to connect twice as much LTGs than a TSGB. The existing LTG cables might be reused due to the layout of the backplanes. Just a small (appr. 30 mm) offset in X direction of the connectors places occurs. Each second rack shall be held free in case of an SNB larger than 126 LTGs due to the higher density of SND. In this free place a rearranging backplane (F:SNCARE) might be build in to connect the existing cables (up to 64) and then feed with 16 new 4 SU cables to the F:SNMUXA. If a F:SNMAT is necessary, no retrofit with the former SSG frames is possible because this frames are housed in a "modifizierte EWSD-Bauweise" rack with a fanbox and a fantray. If the F:SNCARE is present (for retrofit with connection of old LTGs with singles cables to the SN), all interconnecting cables between the F:SNCARE and the F:SNMUX (A) are pre-prepared. Moreover in case of extensions of F:SNMUX(A) (first 63 LTGs) and F:SNCARE (second 63 LTGn) the newly joining LTGs are general connected to F:SNCARE.
28
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
TSG 0-0
TSG 0-1
TSG 0-2
TSG 0-3
TSG 0-4
TSG 0-5
TSG 0-6
TSG 0-7 SSG 0-0/1 SSG 0-2/3
TSG 1-0
TSG 1-1
TSG 1-2
TSG 1-3
TSG 1-4
TSG 1-5
TSG 1-6
TSG 1-7 SSG 1-0/1 SSG 1-2/3
Fig. 16 SNB 504 LTGs: 20 frames
F:SNMUXA F:SNCARE F:SNMUXA F:SNCARE F:SNMUXA F:SNCARE F:SNMUXA F:SNCARE
FAN-TRAY
F:SNMUXA F:SNCARE F:SNMUXA F:SNCARE F:SNMUXA F:SNCARE F:SNMUXA F:SNCARE
F:SNMAT 0 F:SNMAT 1
FAN-BOX
Fig. 17 SND retrofit
SN1127EU13SN_0001
29
Siemens
2.1.1
Switching Network D (SND)
Frame SNMUXA
This chapter describes the module frame F:SNMUX (A) for the switching network SND. To be facilitated to the extension of existing nodes with SNB a more dense setup is required. This means the required modules must make more connections possible. To the module M:LILD now 16 LTG are connected. The first LTG connection of the LILD 0 and the LILD 4 (L63) lead to the message buffer. The modules M: LILD are connected with the module M:MUXC which contains a switching unit 16/16. To a module M:MUXC eight modules M:LILD are connected. To the frame F:SNMUX (A) now max. 126 LTGs are connected. With the F:SNMUX(A) it is possible to expand an existing node by replacing the F:TSG(B) by a F:SNMUX(A) with usage of the existing cabling. In a SND multiplexer rack SND multiplexers are redundantly operated from at least two F:SNMUX (A) and two F:LTG. The rack is a shielded rack in EWSD style (SIPAC construction) with central filter in the rack head. The frame F:SNMUX (A) supports 8 modules of M:LILD, 1 module of M:MUXC and 2 backplane modules of M:OML920. With that a concentration of 126 LTG connections on the post-connected switching unit arises in the full expansion. A granularity of 16 LTG/M:LILD and 126 LTG/F:SNMUX (A) can obtained, by partial equipping with M:LILD modules. F:SNMUX (A) already knows a small switching network created with a minimal configuration of 16 LTG/M:LILD. A partial equipped frame F:SNMUX(A) (63 LTG/F:SNMUX(A)) equipped with 4 M:LILD (= connection of 63 LTGs) and 1 M:MUXC replaces a F:SNB of this expansion. The distribution of the modules LILD 0 to LILD 3 in this module frame is carried out in a way, that for an extension of an existing node the already available wiring can be used. The frame F:SNMUX(A) gets central -48 V/-60V supply, the modules M:LILD and the modules M:MUXC generate itself the voltages needed internally with help of DC/DCfor transformers. The backplane modules OML920 are supplied with 5 V and 3.3 V from the DC transformers on the module M:MUXC.
30
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
1 2 C 3
LILD 3
LILD 7
LILD 2
LILD 6
OML 1
MUXC
OML 0
LILD 5
LILD 1
1
LILD 4
5
LILD 0
4
2 D 3 4 5
Fig. 18 F:SNMUX(A)
SN1127EU13SN_0001
31
Siemens
Switching Network D (SND)
The LILD multiplexes 16 x 8Mbit/s SDC from LTGs and MB to one 184 Mbit/s high speed highway. The ASIC A:MUX16 performs the preparation of incoming/outgoing data from/to the existing environment (LTGs) to the new frame format of the SND. In general there is a equalization memory unit (EMU) for each LTG to align the data, add 2 parity bits and inserts additional 256 time slots (overhead) for supervision purposes (see later chapter) in order to multiplex it to an 184.32 Mbit/s signal. For the outgoing branch a phase alignment, synchronization, parity check, overhead evaluation and distribution (demux) to 16 LTG links is done. For control purposes a HDLC interface to M:MUXC is also provided. From the 8 LILDs, 8 x 184 Mbit/s lead to the MUXC module and in addition 8 x 184 Mbit/s highways are coming from the optical links. This 16 high speed highways are led to an equalization memory (EMU) The main function is the equalization and alignment of 32 (in MUXC only 16 are used) inputs to a central clock system with a central frame mark bit. This is done by 32 (16) speech buffers written with individual incoming frequencies and read by a common central frequency. If all PLLs in the system EWSD are locked, the write pointers and read pointers of these buffers have a small but constant offset which allows the PLLs to adjust the frequency to the system clock without a frame slip or a big delay in the speech path. In free running mode of a PLL (this is already a fault) a frame slip or overlapping may occur but equally for all impacted time slots. After the equalization memory (EMU) the 16 high speed highways are led to a 16/16 switch. This cross point switch 16/16 is realized through 4 ASIC TSC32 (Time Stage Circuit). The ASIC TSC32 is that switching device in the SND. It contains 32 Time Stage Circuits and a space stage 32 # 4. Out of the 32 input lines of 184,32 Mbit/s only 16 are used in M:MUXC. In the Time Stage the speech data is written into a Speech Memory continuously in succeeding order and read according the control data in modified order. The control information is stored in additional 4 memories (one for each output). In the space stage (4 multiplexer 32 # 1 each controlled by a dedicated control memory) at a particular time one time slot of the 32 is switched onto the output. In the 32 memories there is more information stored than can be read by 4 outputs. That is the most important fact for nonblocking in a switch. All speech information is spread onto all inputs so that each output can pick up that time slot information determined by the output related control memory.
32
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
MBUL 0-0 LTG 0-1
...
1
MUX16
184 Mbit/s from 8 LILD 184 Mbit/s
LTG 0-15 LTG 0-16 LTG 0-31 LTG 0-32 LTG 0-47 LTG 0-48 LTG 0-63
LILD 0
... ... ...
4 4
1
...
LILD 1
O
0-7
LILD 2
8-11
12-15
E
EMU 32
LILD 3
OML 920
920 Mbit/s optical link
16 * 184 Mbit/s
MBUL 1-0 LTG 1-1 LTG 1-15 LTG 1-16 LTG 1-31 LTG 1-32 LTG 1-47 LTG 1-48 LTG 1-63
... ... ... ...
32/4 TSC32
LILD 4
0-7 LILD 5 LILD 6 LILD 7
1
...
184 Mbit/s to 8 LILD 1
O
switch 16/16 8-11
E
12-15
OML 920
920 Mbit/s optical link
4 4 184 Mbit/s
uP
GCG MUXC
V24 2x S1 S3
MBD
Fig. 19 Configuration F:SNMUXA-0
Two cables lead to the message buffer; one cable with four HDLC-links (8Mbit/s) with RX/TX, out of those two HDLC-links MBU:LTG and two HDLC-links MBD (S1 interface) and one-cable with one HDLC-link (8Mbit/s) MBD (S3 interface). For larger nodes with more than 252 LTG (126 LTG / F:SNMUX(A)) the F:SNMUX(A) is used in full expansion (8 M:LILD, 1 M:MUXC and 2 M:OML920). The F:SNMUX (A) is connected over glass fiber with 920 Mbit/s with the SNMAT (the switching unit). In nodes with max. 252 LTG (two F:SNMUX (A)), the two F:SNMUX (A) are directly connected with each other over glass fiber with 920 Mbit/s and no F:SNMAT is required. If an existing node shall be expanded (retrofit), the already available wiring can be used and the cables for modules LILD 4 till LILD 7 can be added as 4 SU cables.
SN1127EU13SN_0001
33
34
DP4
DP3
DP2
DP1
CP5
CP4
CP3
CP2
CP1
3 4 9
3 4 1
L63
L61
L59
L57
L54
L52
L50
L48
L55
L53
L51
L49
3 3 3 3 2 2 1 1 5 1 9 3
LILD-3
L62
L60
L58
L56
3 3 1
LILD-7
L127
L119
L126
L118
L125
L117
L124
L116
L123
L115
L122
L114
L121
L113
L120
L112
3 0 1
L47
L45
L43
L41
L38
L36
L34
L32 L33
L39
L37
L96
L111
L103
L110
L102
L109
L101
L108
L100
L107
L99
L106
L98
L105
L97
L104
2 5 3
2 LILD-6 6 1
2 2 6 6 5 1
L35
2 7 1
Backplane view
LILD-2
L46
L44
L42
L40
22 2 88 7 31 7
2 3 7
OML 1
OML 1
2 4 1
MUXC
2 1 3
OML 0
OML 0
2 2 2 2 5 1
LILD-5
L95
L87
L94
L86
L93
L85
L92
L84
L91
L83
L90
L82
L89
L81
L88
L80
1 9 1
1 8 1
1 8 1
L31
L29
L27
L25
L22
L20
L18
1 5 5
L23
L21
L19
L17
1 6 1
L16
1 6 7
LILD-1
L30
L28
L26
L24
1 7 3
LILD-4
L79
L71
L78
L70
L77
L69
L76
L68
L75
L67
L74
L66
L73
L65
L72
L64
11 44 31
L15
L13
L11
L6
L4
L2
LILD-0
L14
L12
L10
L9
L0
1 1 1 2 2 1 5 1 9
L8
L: Cabel of LTGs, directly plugged in MB TSG: Cabel to MBD-S1 MB SSG:Cabel to MBD-S3 ML=MBUL:Cabel to MBD-LTG
SSG
MB
TSG1
MB
L64
ML
TSG0
MB
L0
ML
2 1 0 9 1 9
1 1 3
L7
L5
L3
L1
1 0 7
1 0 1
Siemens
Switching Network D (SND)
Fig. 20 Mixed old and new cabling with 1SU and 4SU cable plugs (F:SNMUX(A))
SN1127EU13SN_0001
SN1127EU13SN_0001 LILD-7
LILD-2
L47 L39
L46 L38
Backplane view
L127L119
L63 L55
DP3
LILD-3
L126L118
L62 L54
DP2
L45 L37
L44 L36
2 4 7
2 LILD-6 6 1
L111L103
L110L102
L109L101
L108L100
L107 L99
L106 L98
L105 L97
L104 L96
2 5 3 2 3 7
OML 1
OML 1
2 4 1
MUXC
2 1 3
OML 0
OML 0
2 2 1
L88 L80
1 9 1
L90 L82
1 8 1
1 8 1 1 6 1
L25 L17
L24 L16
1 6 7
L30 L22
L29 L21
L28 L20
L27 L19
L26 L18
LILD-1
L31 L23
1 9 9 1 8 5
L14 L6
L78 L70
LILD-0
L13 L5
L77 L69
LILD-4
L12 L4
L76 L68
L15 L7
L11 L3
L75 L67
L79 L71
L10 L2
L9 L1
L73 L65
L74 L66
L8 L0
1 2 1
L72 L64
1 1 1 4 4 3 3 1 7
L: Cabel from LTGs, directly plugged in MB TSG: Cabel to MBD-S1 MB SSG:Cabel to MBD-S3 ML=MBUL:Cabel to MBD-LTG
LILD-5
L95 L87
L94 L86
L93 L85
SSG L92 L84
MB
TSG1 L91 L83
MB
L64
ML
TSG0 L89 L81
MB
L0
ML
2 0 1
2 5 5
DP4
L125L117
L61 L53
DP1
L124L116
L60 L52
L43 L35
L123L115
L59 L51
2 6 1
2 7 7
CP5
L42 L34
L122L114
L58 L50
CP4
2 7 1
L40 L32
2 8 1
L41 L33
CP3
2 9 5
L120L112
3 0 1
L121L113
L57 L49
CP2
3 3 2 2 5 1
L56 L48
3 4 1
3 1 9
CP1
3 4 9 1 1 3 1 0 1
Switching Network D (SND) Siemens
Fig. 21 Total new cabling with 4SU cable plugs (F:SNMUX(A))
35
Siemens
Switching Network D (SND)
2.1.2
Frame SNCARE
The module frame F:SNCARE comes to use at the extension of existing nodes, where a F:SNB is replaced by one F:SNMUX (A). Since the capacity of the F:SNMUX (A) allows double of the LTG connections of the SNB, the wires already existing must get spatial distributed. To do this the cables are put to the corresponding places of the F:SNCARE, the data lines are combined and led to a further cable plug plug-in place. The connection to the F:SNMUX is then made 4 SU/8 LTG-cables. It has to be taken into account, that at F:SNMUX (A) the connection MBUL 0 (LTG0) and MBUL 1 (LTG64) is not available for the connection of LTGs since these connections lead to the message buffer. It is therefore used short pins (pin type B) in the backplane at these plug-in places, LTG0 and LTG64, so that no connection to the wires of the interconnecting cable is carried out. All other pins are of the pin type E. 16 cable plug-in places are existing on the backplane of the F:SNCARE (for 1 SU/1 LTG or 2 SU/1 LTG cable). To this the existing cables are put and 4 plug-in places are used for the cables to the F:SNMUX (4 x4SU/8 LTG wires).
3 4 9
CP2 CP3 CP4 CP5 DP1 DP2 DP3
3 3 1
3 33 2 21 5 19
L56 L56
L48 L48 L56
3 3 4 3 1 7
3 1 3
2 8 9
3 0 1
22 2 88 7 31 7
L40 L40
L49 L57 L49 L49 L57 L50 L58 L58 L58 L50 L51 L59 L59 L51 L51 L52 L60 L60 L60 L52 L53 L61 L61 L53 L53 L54 L62 L62 L62 L54 L55 L63 L63 L55 L55
2 7 1
2 2 6 6 5 1
L32 L32 L40
L33 L41 L33 L33 L41 L34 L34 L42 L42 L42 L35 L43 L43 L35 L35 L36 L44 L44 L44 L36 L37 L45 L45 L37 L37 L38 L46 L46 L46 L38 L39 L47 L47 L39 L39
2 5 3
2 4 1
2 2 1
2 0 1
1 9 3
11 87 19
1 7 3
L24 L24
1 6 7
1 6 1
1 5 5
L16 L16 L24
L17 L17 L17 L25 L25 L18 L18 L26 L26 L26 L27
L19 L19 L19 L27
L20 L20 L28 L28 L28 L21 L29 L29 L21 L21 L22 L30 L30 L30 L22 L31
L23 L31
L23 L23
1 4 7
1 4 1
1 11 2 21 5 19
1 3 1 L8 L8
L9
L0 L8
1 1 3
1 0 7
1 0 1
L0
L1 L1 L9
L2 L2 L10 L10 L10 L11
L12 L12
L3 L11 L4 L12
L3
L3
L4
L5 L13 L13 L5
L5
L6 L14 L14 L14 L6 L15
L7 L15
L7
L7
DP4
Fig. 22 F:SNCARE (backplane view)
36
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
2.1.3
Frame SNMAT
The new switching unit structure and the switching unit module M: MATM produce the new frame F:SNMAT. The F:SNMAT is put duplicated in the rack (ÖN style or modified EWSD style) and supports the optical links to F:SNMUX and with this the connections to the LTGs. Besides this F:SNMAT also supports a 8 Mbit/s HDLC interface to the MBD over the F:MATC. A module M:MATM corresponds to a matrix 128/16 with up to 252 connectable LTGs. The full equipping of a F SNMAT with 8 M:MATM guarantees a matrix 128/128 with up to 2016 connectable LTGs. Every matrix module couples 128 input signals on 16 outputs. 4 multiplexer link modules M:OML920 are fixed assigned to every matrix module with respectively 4 date inputs each. These 4 OMLs conduct the 16 electrical 184 Mbit/s data streams in the form four optical 920 Mbit/s data streams to the backplane modules OMLs of the F:SNMUX. In the opposite direction from the SNMUX to M:MATM, the serial data streams are converted by the M:OML920 into 4 parallel 184 Mbit/s data streams. Each of these 4 signals is then split into 8 output signals and supplied to each of the 8 M:MATM. The non-blocking matrix structure given by this, is controlled, supervised and provided with clock in the F:SNMAT by the M:MATC. Over the M:MATC the switching unit redundantly operated in the rack, is connected by electrical cable links (8 Mbit/s data, 8 MHz clock and 2 kHz FMB) with the message buffer D.
optical link 920 Mbit/s
optical link 920 Mbit/s optical link 920 Mbit/s
optical link 920 Mbit/s
to/from F:SNMUX
M:MATM - 0
OML920-0 0 OML920-0 1 OML920-0 2 OML920-0 3
........... OML920 - 1/6 0/3 ...........
optical link 920 Mbit/s
optical link 920 Mbit/s optical link 920 Mbit/s
optical link 920 Mbit/s
M:MATC
to/from MBD
........... M:MATM - 1...6 ........... M:MATM - 7
OML920-7 0 OML920-7 1 OML920-7 2 OML920-7 3
electrical link 184 Mbit/s
2 Mbit/s HDLC
8 Mbit/s HDLC
Fig. 23 Configuration of F:SNMAT
SN1127EU13SN_0001
37
Siemens
Switching Network D (SND)
The following figure shows the basic flow of the speech information in an F:SNMAT and the allocation of the main functions over the modules. In F:SNMAT the switching matrix is made of 8 modules for enlargement in linear equal steps. Each module contains a switch 128 inputs to 16 outputs. 8 modules combined forms a switch with 128 inputs to 128 outputs (128 # 128, that sign # means a matrix) where each input is connected onto each module which is an important realization detail of the matrix. 8 modules with 16 outputs each are the required 128 outputs (due to the fact that outputs cannot be connected together). Each input or output contains 2304 time slots (8 bit + 2 parity bits, 184.32 Mbit/s). In each crossing point of the matrix there is a Time Stage Circuit realized for 32 inputs by the ASIC A:TSC32 which contains a space stage 32 # 4 as well. As shown in the following figure the matrix 128 # 4 is build up in two levels (level 1: 4x 32 # 4 = 128#16) and (level 2: 16 # 4). 4 of such arrays are a matrix 128#16. In level 2 the RAMs inside the A:TSC32 are not used for a time stage but for the TSSI function in case of a multi channel connection. The ASICs A:EMU32 have no switching functionality but they are necessary to align all incoming signals from op to 16 F:SNMUXA with different locations and cable length between 0 and 200 meters. The controller M:MATC performs the preprocessing for the path setup commands received from CP via the MBD-interface S3 and distributes the information to the
38
SN1127EU13SN_0001
SN1127EU13SN_0001
4
310
310 310
31
1
0
31
DC/DC
V24
V24
mP
OML 3 OML 1 OML 2
TSC 32
0 15
31
0
31
HDLC
MATM 0
31
28-31
EMU32
0
......
EMU32
0
TSC TSC TSC TSC 32 32 32 32
0
31 0
31
0
0
....
EMU32
28-31
0...3
OML 920
EMU32
0-3 4-7
....
0...3
OML 920
0
....
V24
V24
GCG
MATC MBD
S3
HDLC
uP
MEM
MATM 6
..... 28-31
0
31
0
31
31 0
310
310
DC/DC
V24
V24
mP
OML 30 OML 28OML 29
TSC 32
0 15
31
0
28-31
0
31
EMU32
HDLC
MATM 7
31
0
31
0
0
31
EMU32
EMU32
EMU32
TSC TSC TSC TSC 32 32 32 32
0
0-3 4-7
4
....
31
OML 920
electrical links with 184 Mbit/s ....
4
(OML 8) . . . . . . . . . . . . . .(OML 30)
optical links with 920 Mbit/s
MATM 1.
OML 920
7
Switching Network D (SND) Siemens
controllers on the modules M:MATM. The central clock generator, PLL and 5 V power supply for the entire frame are located also on M:MATM.
On the rear side of the frame up to 32 M:OML920 can be connected. This is a bidirectional transparent optical transmission link to/from the F:SNMUXA. Each of them contains 4 x 184.32 Mbit/s.
Fig. 24 Configuration of F:SNMAT
39
Siemens
Switching Network D (SND)
Construction: l
8x M:MATM
l
1x M:MATC
l
32x OML920 on the rear side of the backplane
Forced air convection is required All cables are bi-directional links (except the power cables). l
Cables for LTG / CCNC 2 SU for 1 LTG reuse of existing cable type 1 SU for 1 LTG reuse of existing cable type 4 SU for 4 LTG new type: 0.25 mm diameter, max. 100 meter
l
Cable for MBU:LTG (especially for MBD) 4 SU for 4 Links 2x MBU:LTG 2x MBU:TSG
l
Cable for S3 interface 1 SU for 1 Link, data rate for 16 former SGCs can be transmitted (time multiplexing)
l
Cable for SNCARE 4 SU for 8 LTG links
40
l
Cable for V24 interface with SubminD-connectors
l
Fiber optic cable removable on both ends (OML920)
l
2 power cables for F:SNMAT (connection of fuse panel <=> F:SNMAT)
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
1 2 C
3
MATM 0
MATM 1
MATM 2
MATM 3
MATC
MATM 4
1
MATM 5
MATM 7
5
MATM 6
4
2 D
3 4 5
Fig. 25 F:SNMAT
Ba c kp la n e vie w M A TM 7
M A TM 6
PWRB
SU 1
C 1
SU 2
C 2
SU 3
C 3
SU 4
C 4
PWRB
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
M A TC
M A TM 3
PWRA
PWRA
PWR A
MA TM 2
OML 920
OML 920
PWRA A
OML 920
OML 920
M A TM 0
M A TM 1
PWRA
OML 920
PWRA
OML 920
OML 920
OML 920
C 1
C 2 X239C1
C 3
C 4
OML42 (OMLINV) X257D2
X227C1 OML31
OML33 (OMLINV) X239D2 X227D2
X205C1 X193C1 OML30 OML21
OML32 OML23 (OMLINV)(OMLINV) X205D2 X193D2
X171C1 X159C1 OML20 OML11
OML22 OML13 (OMLINV) (OMLINV) X171D2 X159D2
X137C1 X125C1 OML10 OML01
OML12 OML03 (OMLINV) (OMLINV)
X113C1
OML52 OML43 (OMLINV)(OMLINV) X291D2 X279D2
X257C1 OML40
X147C1
OML62 OML53 (OMLINV)(OMLINV) X325D2 X313D2
X291C1 X279C1 OML50 OML41
X181C1
OML72 OML63 (OMLINV) (OMLINV) X359D2 X347D2
X325C1 X313C1 OML60 OML51
X215C1
OML73 (OMLINV) X381D2
X359C1 X347C1 OML70 OML61
X239C1
X381C1 OML71
X267C1
D 1
M A TM 4
PWRB
X301C1
SU 6
OML 920
X335C1
C 5
PWRB
OML 920
X369C1
SU 5
M A TM 5
X137D2 X125D2
X103C1 OML00
C 5
OML02 (OMLINV) D 1 X103D2
SU 7
D 2
SU 8
D 3
MBC
D 3
SU 9
D 4
PWR B
D 4
S U 1 0
D 5
D 2
OML 920
OML 920
OML 920
OM L 920
OML 920
OML 920
OML 920
OM L 920
OML 920
OM L 920
OM L 920
OM L 920
OML 920
OML 920
OML 920
OML 920
A
A
101
111
121
131
141
85
151
161
171
181
85
191
201
211
60
221
231
70
241
251
261
85
271
281
291
301
85
311
321
85
331
341
351
361
371
381
385
45
D 5
85
Fig. 26 F:SNMAT (backplane view)
SN1127EU13SN_0001
41
Siemens
2.2
Switching Network D (SND)
Module MATC
The main tasks of the module M:MATC are: l
Synchronization of F:SNMAT with system clock from MBD
l
Processing of commands/messages from/to MBD over 1 HDLC-link with 8,192 MHz
l
Supervision of reference clock from MBD
l
Supervision of all HDLC-links
l
Control of the 8 M:MATM over HDLC-links with 2,048 Mbit/s
l
Support of test interfaces (JTAG/Boundary Scan, V.24, Tracer)
l
Power supply of module and of 32 connected M:OML920.
System HF-clocks (92MHz) to 8 MATM modules
Clock Generator (PLL) 2 MBit/s HDLC to/from MATM0
HDLC1
2 MBit/s HDLC to/from MATM1
HDLC2
2 MBit/s HDLC to/from MATM2
HDLC3
2 MBit/s HDLC to/from MATM3
HDLC4
System FMB92 (8kHz) to 8 MATM modules clock only
diff I/O
from/to MBD 8 MBit/s HDLC 16 channels at 128 kBit/
HDLC CONTROLLER HDLC
V.24
V.24
CPU 2 MBit/s HDLC to/from MATM4
HDLC1
2 MBit/s HDLC to/from MATM5
HDLC2
2 MBit/s HDLC to/from MATM6
HDLC3
2 MBit/s HDLC to/from MATM7
HDLC4
MATM plugged I/O
BOST HDLC CONTROLLER
FEPROM
RAM BDM
Power Supply DC/DC 3V3, 18 W
M:MATC
LEDs
Power Supply DC/DC 5V, 60 W
-48/-60V 5V Supply for OML920 JTAG
Fig. 27 Block diagram M:MATC
42
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
2.3
Module MATM
The main tasks of the module M:MATM are: l
Phase/Word-Alignment of incoming 184,32 Mbit/s-highway-data
l
Equalization Memory Unit for speech data to equalize clock and cable length differences
l
Switching over a switching matrix with 128 inputs (each 184,32 Mbit/s / 2304 time slots) to 16 outputs (each 184,32 Mbit/s / 2304 time slots)
l
TSSI (Time Slot Sequence Integrity) function
l
BSI ( Bit Sequence Integrity) function
l
Speech path monitoring during operation
l
Processing of commands/messages from/to M:MATC over a HDLC link with 2,048 Mbit/s
l
3,3V-supply, control and monitoring of 4 x M:OML920
l
Control of ASICs (4 x A:EMU32, 20 x A:TSC32)
l
Passive clock distribution (92 MHz and 8 kHz) to the ASICs
l
Support of several test interfaces (V24, Tracer, JTAG, BDM) from 32 OML920s 128 x data (184 Mbit/s, differential) without clock
A:EMU 32 Phase Aligner
A:TSC32 A:TSC32 A:TSC32 A:TSC32 32#4 32#4 32#4 32#4
to 4x OML920 4x4 data (184 Mbit/s, differential with 4x clock)
A:TSC32 16#4 TSSI
4x HDLC bus
Clock buffer
EEPROM HDLC HDLC HDLC HDLC
RAM
3,3V
Board Controller V24
1,2V
I/O
HDLC-Slave Boundary Scan JTAG
from M:MATC CLK92 FMB8 differential
DC/DC Converter 3.3V
OML920 Control and supply
-48/-60V
HDLC BDM
to M:MATC M:MATM plugged
V24 BOST board address interface
to/from M:MATC 2 Mbit/s HDLC
Fig. 28 Block diagram of M:MATM
SN1127EU13SN_0001
43
Siemens
2.4
Switching Network D (SND)
Module MUXC
The main tasks of the module M:MUXC are: l
Phase/Word-Alignment of incoming 184,32 Mbit highway data
l
Equalization Memory Unit for speech data to equalize clock and cable length differences
l
The M:MUXC receives/transmits the 184,32 Mbit/s highway data to/from the M:LDID depending on the system configuration: to/from the M:LILD in a system configuration of < 126 LTGs to/from a second F:SNMUX(A) via M:OML920 in a system configuration of > 126 LTGs and <252 LTGs to/from a F:SNMAT via M:OML920 in a system configuration of > 252 LTGs
l
Synchronization of F:SNMUX(A) to system clock from MBD
l
Processing of commands/messages from/to MBD over 3 HDLC links with 8,192 MHz
l
Speech path monitoring during operation
l
Supervision of reference clock from MBD
l
Control of 8 M:LILD over HDLC link with 2,048 MHz
l
Monitoring of all HDLC links
l
Control of 2 backplane modules M:OML920
l
Control of ASICs (EMU32, 4 x TSC32)
l
Support of several test interfaces
l
Power supply of module and of 2 connected M:OML920.
l
Interfaces to the Message buffer There are three HDLC connections (RX/TX) with the message buffer. 2 HDLC links MBD-S1 correspond to the TSG interface with regard to the electrical qualities at SNB and serve for the reception and for sending of commands to/from the CP. 1 HDLC link MBD-S3 corresponds to the SSG interface with regard to the electrical qualities at SNB and serves for the reception and for sending of commands of this/to the CP.
l
Interfaces to the modules M: LILD Eight 2 Mbit/s HDLC connections lead directly to the modules M:LILD. The control of the modules M:LILD are carried out via those connections. In direction to the M:LILD clock and data are transmitted, in direction from the M:LILD only data. Eight 184 Mbit/s connections (RX/TX) are leading to and from M:LILD.
44
SN1127EU13SN_0001
Switching Network D (SND)
Siemens
The module M:MUXC delivers eight 92 MHz system clocks CLK92 and eight 8 kHz/50:50 (synchronous with 92 MHz time) FMB92 clocks. Those clocks serve the 184 Mbit/s connections with synchronization. The module M:MUXC delivers eight 8 MHz system clocks CLK8 and eight 2 kHz/50:50 FMB2 clocks. Those clocks serve the 8 Mbit/s SDC interfaces for the LTGn with synchronization. A signal LILD_PRESENTx (x = 0 to 7) is led to M:MUXC of every M:LILD. A signal LILD_RESETx (x = 0 to 7) is led from M:MUXC of every M:LILD. l
Interfaces to the backplane modules M: OML920 From and to two M:OML920 lead four 184 Mbit/s connections each ( 4 times data from the M:OML920 and to 4 times data and one time clock to the M:OML920). Four control lines to each OML support the signals OML_PRESENT (backplane module plugged in), OML_OLOOP (loops the receiving data to the transmit data), OML_FINS (fault insertion) and OML_SWITCH (switch signal). The M:MUXC provides the power supply with VCC3V (3.3 V) and VCC5V (5 V) for the two M:OML920.
l
Further interfaces: The JTAG interface ends at the plug of the backplane. The power supply is carried out centrally with-48V/-60V. Remote Inventory. 6 lines are needed for an I2C interface. A BoST interface with the three signals BOST_RESET, BOST_MODE and BOST_RESULT ends on pins of the backplane. V24 interface. This interface is led to a plug at the front panel of the module. A test adapter interface. This interface is led only to a plug at the front panel of the module.
SN1127EU13SN_0001
45
Siemens
46
Switching Network D (SND)
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
A:EMU32 differential line receiver phase/word alignment parity check/generation serial/parallel-conversion equalization memory maintenance channel check/generation insertion RAM-ID in maint. ch. parallel/serial-conversion 16 x 184 Mbit/s data, differential line transmitter 2 x 184 MHz clock
LILD 1 2 from LILD 184 Mbit/s data, differential 8
...
LILD 1 2
to LILD 184 Mbit/s data, differential
1 •from OML •184 Mbit/s data •differential 8
4x A:TSC32
1 •to OML •184 Mbit/s data (8) and 184 MHz •clock (2), diff. 8
differantial line driver serial/parallel -conversion maintenance check/generation RAM-ID check cross point switch 16/16 parallel/serial-conversion differential line transmitter
8
2 Mbit/s HDLC
to/from LILD 2 Mbit/s HDLC
V24 OML-Control BOST Boundary scan
1 Board Controller
8
LILD-Control Board-ID
Power Supervisory differential line receiver/ transmitter
to/from MB-D 3x8 Mbit/s HDLC, 2x (1*128 kbit/s, diff.) 1x (2*128 kbit/s, diff.)
Clock Generator (PLL)
+3,3V
DC/DC Converter
-48/-60V
M:MUXC 1 8 +5V +1,2V to LILD +3,3V 92 MHz clock, diff. 8 kHz FMB, differential to OML 8.192 MHz clock, 2 kHz FMB
Fig. 29 Block diagram of M:MUXC
SN1127EU13SN_0001
47
Siemens
2.5
Switching Network D (SND)
Module LILD
The main tasks of the module M:LILD are: l
8 Mbit/s interfaces for 16 LTGs, consisting our of data, clock and frame mark bit for each direction.
l
Clock adaptation of LTG input to M:LILD internal clock with EMU
l
Monitoring of LTG Interface (frame mark bit and clock)
l
Multiplexing of the 16 LTG 8 Mbit/s inputs to a high speed link with 184 Mbit/s
l
Insertion of parity bits (2 per 8 bit) and overhead bytes (256 bytes per 184 Mbit/s high speed link).
l
De-multiplexing of the 184 Mbit/s high speed link input to 16 LTG outputs of 8 Mbit/s with the help of a FIFO function)
l
Overhead- and parity bit evaluation of the 184 Mbit/s high speed link input
l
Loop insertion in data paths for test and maintenance purposes
l
Boundary scan interface for factory test.
l
HW pre-arrangement for remote inventory and improved maintenance
l
Interfaces to the LTGn These 16 interfaces carry a 8 Mbit/s signal with 8 Mbit/s data, 8 MHz clock and a 2 kHz/122 ns FMB2 frame mark bit (synchronous with 8 MHz clock) for every LTG in sending and reception direction. Note: The connection of the LTG0 (LILD 0) and the connection of the LTG64 (LILD 4) is used as connection to the message buffer.
l
Interfaces to the M: MUXC: A 2 Mbit/s HDLC connection leads directly to M:MUXC: Data run over it in sending and reception direction and a 2 MHz clock, which is delivered by M:MUXC. A 184 Mbit/s connection carries the data in sending and reception direction. The 184 MHz clock create the modules M:LILD and M:MUXC internal from the 92 MHz system clock. There is no 184MHz clock line between the modules. The 92 MHz system clock and the 8 kHz FMB92 clock are delivered by M:MUXC and serve for the synchronization to the 184 Mbit/s connections. The 8 MHz system clock and the 2 kHz FMB2 clock are delivered by M:MUXC and serve for the synchronization of the 8 Mbit/s HDLC connections. A signal PRESENT is led to M:MUXC from every M:LILD and reports, that M:LILD is plugged in. Each M:LILD gets a signal RESET_L of the M MUXC. This allows a selective reset of every M:LILD.
48
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
l
Further interfaces A JTAG interface of the ASIC MUX16 ends at the plug of the backplane. The power supply is carried out centrally with-48 V/-60V. Three pins module address (MOD_ID0, MOD_ID1 and MOD_ID2). They are fixed coded for every M:LILD on the backplane.
MBUL LTG 1
differential LTG line receiver and line termination
8 bit/ 10 bit conversion (parity generation) 16 EMUs overhead insertion multiplexing of 16 LTGs to 184 Mbit/s LTG-loops
differential LTG line transmiter and line termination
phase alignment word alignment synchronisation and FMB 10 bit/ 8 bit conversion (parity check) Overhead buffer Overhead evaluation demultiplexing of 184 Mbit/s to 16 LTGs HS data link loop
LTG15 MBUL LTG1
LTG15 DCC 48V/60V 3.3 V
HDLC interface control functions
to MUXC 184,32 Mbit/s diff.
MUX16
Power on reset
Address pins
from MUXC 184,32 Mbit/s diff.
LILD Plugged pin
serial HDLC interface to/from MUXC
Fig. 30 Block diagram of M:LILD
SN1127EU13SN_0001
49
Siemens
Switching Network D (SND)
Frame structure and synchronization for the 184 Mbit/s SND data signal The LTG data are transmitted on a 184 Mbit/s Highway between M:MUXC and M:LILD. The 184 Mbit/s highway contains 16 x 128 user channels and 256 test channels altogether 2304 channels. Each channel consists out of 10 bits. The two extra parity bits (odd and even parity) are inserted in the 8 bit user data to monitor data integrity. These channels are combined in 18 virtual blocks to each 128 channels. The 256 test channels are located as follows. Each of the 18 blocks contains 14 test channels at fixed addresses. The remaining 4 test channels are located in block no. 0 and 9 at the relative address 17 and 18. In the next table the locations of all test channels are listed. Any other channel, not listed there, is a normal payload channel. In the following table the location of the test channels in the data stream is defined. A subset of the 256 test channels is available for synchronization, memory address supervision and memory identification tests used, i.e. 239 channels are free for other applications. The test channels used for synchronization and address supervision are represented one by one in the following table. Three programmable test channels are used for a further test feature between the ASIC EMU32 and TSC32 (default are channel H'11,H'12 and H'41).
50
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
block 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
0 syn0 asw5 asw6 tstch asw7 tstch tstch tstch asw8 tstch tstch tstch tstch tstch tstch tstch asw9 tstch
1 syn1 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
2 syn2 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
3 syn3 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
relative test channel addresses in each block 4 8 16 17 18 32 64 65 asw0 asw1 asw2 tstch tstch asw3 asw4 tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch
66 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
67 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
68 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
127 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
syn = synchron word channel asw = addresses supervision word channel tstch = test channel payld = payload channel 3 x tstch are needed for a special test feature between EMU 32 and TCS 32 (RAM-ID)
Fig. 31 Frame structure of 184.32 mbit/s signal
syn0 syn1 syn2 syn3 asw0 asw1 asw2 asw3 asw4 asw5 asw6 asw7 asw8 asw9 Channel-address Channel content without parity bits
0
1
‘F6’ *) ‘F6’ *)
2
3
4
8
16
32
64
128
256
512
1024
2048
‘28’ *)
‘28’ *)
‘03’
‘04’
‘05’
‘06’
‘07’
‘08’
‘09’
‘0A’
‘0B’
‘0C’
Fig. 32 Values of syn- and asw-words of the 184 mbit/s-highways
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Parity even
Parity odd
data 7
data 6
data 5
data 4
data 3
data 2
data 1
data 0
Fig. 33 Data format at high speed output
SN1127EU13SN_0001
51
Siemens
2.6
Switching Network D (SND)
Module OML920
The optical multiplexer link module OML920 is a transparent transceiver backplane module. The necessary length of the data connection between SNMAT and SNMUX can be up to 200m. For the data connection at the needed data rate and distance, it is more economic to use an optical link then to use an electrical connection. Four electrical data streams with 184.32Mbit/s each are transmitted from one OML920 module to another OML920 module by an optical fiber. It provides a bidirectional data connection with a fiber length up to 200m. The laser diode has a wave length of 1300nm and a PIN diode converts the optical signal into an electrical signal. l
Transmitter part: The 4 electrical input data streams are sampled with the system clock, coded, multiplexed and than converted into a serial optical data stream with 920Mbit/s, which is output to an optical fiber.
l
Receiver part: The optical input data are converted into an electrical data stream, paralleled, decoded and sent to the electric data output ports. The 8 output ports (each with 4 serial 184Mbit/s data streams) provide all the same data. For the application in the SNMUX, all output ports except port 0 are deactivated.
The module can be plugged to the backside of F:SNMUX, F:SNMAT in its standard position and in the upside down position. The module is plugged to the backplane with row 112 at the top (normal position). In the SNMAT frame there are OML920 modules in an upper row and in a lower row. In the upper row the modules are plugged in normal position, in the lower row they are plugged in the opposite position which means that module is plugged with the row 112 to the lower side. The dimensions of the module are 94 x100 mm x19 mm and it can be plugged and pulled during operation. In case of interface faults for example OML faults it is difficult to detect the end of the interface that is defect (OML on SNMUX or OML on MATM/SNMUX). To simplify to procedure of OML repair all OML faults (near and far end) will be assigned as faults of the connected SNMUX. Moreover diagnostics of the SNMUX will be able to verify the functionality of the OMLs on both ends.
52
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
SND (EWSD)
SNMAT
SNMUX OML920
OML920 port 0
E
0
0
E
OLX920
OLX920 E
0
0
E
port 0 . . . port 7
Connections: 920 Mbit/s optical
4x184 Mbit/s electrical
Fig. 34 Application of the OML920 module in the switching network SND with SNMAT
SND (EWSD)
SNMUX
SNMUX OML920
OML920 port 0
E
0
0
E
OLX920
OLX920 E
0
0
E
port 0
Connections: 4x184 Mbit/s electrical
920 Mbit/s optical
Fig. 35 Application of the OML920 module in the switching network SND without SNMAT
SN1127EU13SN_0001
53
Siemens
Switching Network D (SND)
The M:OML920 has a bi-directional optical interface (920 Mbit/s), which leads to F:SNMAT. It has 4 equal-type electrical interfaces with each data inputs (184 Mbit/s) and each 8 data outputs (184 Mbit/s) per receipt of which however only one leads to the M:MUXC. Sending clock is 184 MHz and is derived from the M:MUXC. l
Interfaces to the M: MUXC: There are 4 data inputs with data of the M:MUXC (184 Mbit/s). Out of the 32 data outputs (184 Mbit/s) respectively only one output is led to the M:MUXC. All other outputs are not used and over the control signal PDIS disabled The M: MUXC delivers sending clock of 184 MHz. The power supply for OML920 is carried out by the M:MUXC. These are VCC3V (3.3 V) and VCC5V (5 V). 4 Control lines are available to the control of the OML. These are the signals PLUG, FINS, OLOOP and OSW.
l
Further control line: The control line PDIS about the backplane SNMUX (A) is connected to GND and serves for the switching off of the not needed outputs, at the F:SNMUX(A) these are the outputs 1 to 7 for each of the 4 inputs.
l
Interfaces to the F: SNMAT: The optical interfaces drive signals with 920 Mbit/s.
54
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
OML920 Module OLX920 ASIC
TCLK920
Clock Generation
OCIP/OCIN
Laser Control
ODIO...3N
4B/5B Coder
4
4
P
5
E S
O
OPTO
O
OPTI
4
ODO0...3N1
4
ODO0...3P7/
4
Descrambler
4
ODO0...3P1/
Fault Insertion
ODO0...3N0 4
RCLK184
ODO0...3N7 PDIS
Synchronisation
FINS
5
P E
S RCLK920
ODO0...3P0/
4B/5B Decoder
ODIO...3P/
Scrambler
TCLK184
Clock Recovery
LOOP PLUG OSW
(not connected)
Fig. 36 Block diagram of M:OML920
SN1127EU13SN_0001
55
Siemens
Switching Network D (SND)
The signal is 4B/5B coded and multiplexed to a serial data stream. This coding is done to ensure a correct stream alignment on the receiver side and to enable AC coupling of the serial data stream. The coding is done according to the following table:
4 bit-word (TS0 TS1 TS2 TS3) 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111
5 bit-word (TC0 TC1 TC2 TC3 TC4) Normal operation 00101 10001 10010 10011 10100 10101 10110 00111 11000 01001 01010 01011 01100 01101 01110 11010
Fig. 37 Code table of the 4B/5B-coder
56
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
2.7
Clock Distribution Architecture
The clock distribution of SND has to meet following requirements: l
Distribution of EWSD system clock to all LTG’s of EWSD
l
Distribution of clock to all ASIC’s inside SND
l
Hold over function for PLL
l
Switching off the CLK8 in case of a PLL alarm (only valid on F:SNMUXA and APS>=V14)
The clock source of all SND clock frequencies is the Message Buffer (MB). The system clock consisting of 8.192 MHz and the Frame Mark Bit (FMB) is distributed via SDC-link from the Message Buffer MBD to all frames of SND. Inside the frames F:SNMAT and F:SNMUXA the clock is regenerated and distributed via the modules MATC and MUXC.
MBD
SNMUXA
8.192 MHz + FMB
SNMAT MUXC
MATC
MATM
LILD
LTG
LILD
LTG
.. ...
LILD
OML920
OML920
OML920
OML920
MATM
..
MATM
OML920 OML920
184 MHz
LTG
Fig. 38 Clock distribution of SND
SN1127EU13SN_0001
57
Siemens
Data FMB Clock
Switching Network D (SND)
S/P
Phase Alignment Synchronisation Word Alignment
EMU HSDO
LTG Data FMB Clock
S/P
EMU
OML920
EMU32 EMU
clock domain boarder CLK92
counter
PLL
PLL counter
FMB92
P/S clock domain boarder HS Data
HS Clock
Synchronisation Word Alignment
MUX16
TSC32 speech memory
PLL counter
clock domain boarder
FIFO
Phase Alignment Synchronisation Word Alignment
HSDI
HSDI
HSCI CLK92 FMB92 FMB2 CLK8
FMB2 CLK8
PLL MUXC
LILD0 LILD7 separate point to point clicktree to all LILDs and ASICs
OML920
from MBD
Fig. 39 Clock architecture of F:SNMUXA
58
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
HSDO
OML920
Phase Alignment Synchronisation Word Alignment
EMU32 FMB92 CLK92
EMU
PLL counter PS HS Data
HS Clock
synchronisation word alignment
TSC32 FMB92 CLK92
speech memory from other TSC32s
PLL counter
synchronisation word alignment
TSC32 FMB92
M:MATM7....
CLK92
speech memory
PLL counter
point to point clicktree to each module
M:MATM0
CLK92 FMB92
HSDI HSCI
PLL from MBD
M:MATC
Fig. 40 Clock architecture of F:SNMAT
SN1127EU13SN_0001
59
Siemens
2.8
Switching Network D (SND)
Interface MBD/SND
On the following figures the interfaces to the MBD are shown, depending on the different capacity stages of SND. There are 3 different Interfaces (S1...S3), but only the types S1 and S3 are relevant for SND. Commands and messages can be received by the modules of SND on various interfaces. However, the received commands lead to different reactions, depending on the capacity stages, the interface and the jobcode (JC2). All messages to the CP have always to be sent via that physical line and on the same time multiplex channel as the corresponding command had been received on. For spontaneous messages a data path has to be defined. The CP commands/messages to/from SND are transmitted with 128 kbit/s (2 time slots per frame). l
Extension range <= 126 LTG: Action on MUXC (LILD) Command interfaces: S1 (X.0, X.1): MUXC is used as switch S3 (CH0/1): MUXC is used as switch
l
Extension range <= 252 LTG: Action on MUXC (LILD) Command interfaces: S1 (X.0, X.1): MUXC is used as switch or as multiplexer S3 (CH0/1, CH2/3): MUXC is used as switch
60
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
used as switch
up to 126 LTG
MUXC 0
S1
S... type of interface 0. 0. 0. 0 1 2
0. 0. 0. 3 4 5
1. 1. 1. 0 1 2
1. 1. 1. 3 4 5
7. 7. 7. 0 1 2
7. 7. 7. 3 4 5 S3
MBDH 0
MBDH 1
...
MBDH 7
MBDCG
MBD
MBDC IOP:MB
Fig. 41 MBD-interface at SND:126LTG
used as multiplexer
used as switch
up to 126 LTG up to 126 LTG
MUXC 1
MUXC 0
S1
S... type of interface 0. 0. 0. 0 1 2
0. 0. 0. 3 4 5
1. 1. 1. 0 1 2
1. 1. 1. 3 4 5
7. 7. 7. 0 1 2
7. 7. 7. 3 4 5 S3
MBDH 0
MBDH 1
... MBDC
MBDH 7
MBDCG
MBD
IOP:MB
Fig. 42 MBD-interface at SND:252LTG
SN1127EU13SN_0001
61
Siemens
l
Switching Network D (SND)
Extension range <= 504 LTG: Action on MUXC (LILD) or on MATC (MATM) Command interfaces: S1 (X.0, X.1): MUXC is used as a multiplexer S3 (CH0/1, CH2/3, CH4/5, CH6/7): MATC (MATM) is used as switch
l
Extension range <= 2016 LTG: Action on MUXC (LILD) or on MATC (MATM) Command interfaces: S1 (X.0, X.1): MUXC is used as multiplexer S3 (CH0/1, CH2/3, CH4/5, CH6/7, ... CH30/31): MATC (MATM) is used as a switch
MATM
switch used as multiplexer
MATM
MUXC
up to 126 LTG up to 126 LTG up to 126 LTG up to 126 LTG
3
. . .
MUXC 2
MUXC 1
MATM
MUXC 0
S1
S... type of interface 0. 0. 0. 0 1 2
0. 0. 0. 3 4 5
MBDH
1. 1. 1. 0 1 2
0
7. 7. 7. 0 1 2
1. 1. 1. 3 4 5
MBDH
7. 7. 7. 3 4 5 S3
... 1
MBDC
MBDH
7
MBDCG
MATC
MBD
IOP:MB
Fig. 43 MBD-interface at SND:504LTG
62
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
switch
used as multiplexer up to 126 LTG
.
used as multiplexer
. .
up to 126 LTG
up to 126 LTG
MATM
15
MUXC MATM
14
MUXC 3
. . .
MUXC
up to 126 LTG up to 126 LTG
up to 126 LTG
MUXC
2
MUXC 1
MATM
MUXC 0
S1
S... type of interface 0. 0. 0. 0 1 2
0. 0. 0. 3 4 5
1. 1. 1. 0 1 2
MBDH 0
1. 1. 1. 3 4 5
MBDH 1
7. 7. 7. 0 1 2
... MBDC
7. 7. 7. 3 4 5
MBDH
S3
7
MBDCG
MATC
MBD
IOP:MB
Fig. 44 MBD-interface for SND:2016LTG
Interface Type S1 This interface corresponds to the MBUS interface “TSG“ of SNB. The format is changed. Interfaces of the type S1 are always connected to modules of type MUXC of SND. The interface S1 consists of 2 physical lines, which are characterized by X.0 and X.1. The X characterizes the number of the MBDH module (0...7) on the MBD. The digit 0 or 1 shows the number of the termination on the module used for connecting the line. The function of the terminations is the same as those of TSG (TSG0, TSG1) of the SNB. Interface Type S3 The interface S3 is a new one for the MBD. The information of max. 4 physical SSGlines of the SNB are integrated by time multiplex onto one physical line. Additional, the interface S3 contains 12 further channels, which are used for the extension from 504 LTGs up to 2016 LTGs (the extension can be used with CP (APS >= V14) only). Thus, depending on the extension of the SND, the interface S3 contains up to 16 "SSG"-information's. (For each logical connection there are used two time multiplex channels:. CH0/1, CH2/3, ... , CH30/31). With the extension range up to 504 LTGs only the channels CH0/1 ... CH6/7 are used. Depending on the extension range, the interface S3 either is connected to a MUXC (<= 252 LTG) or to a MATC (> 252 LTG).
SN1127EU13SN_0001
63
Siemens
time slots frame 4 x 128 time slots
Switching Network D (SND)
0
2
4
127
0
127
0
127
0
126 127
127
0
126 127
8 bit 4 x 125 ms frame 8/16 bit = 64/128 kbit/s
data 8,192 Mbit/s
CLK8 8,192 MHz
FMB2
The time slots 0/1 are used only
2 kHz
The MSB will be sent first There is no alignment of message bytes to the time slots marked by the FMB.
Fig. 45 Timing diagram S1
time slots frame 4 x 128 time slots
0
2
4
127
0
127
0
8 bit 4 x 125 ms frame 8/16 bit = 64/128 kbit/s
data 8,192 Mbit/s
CLK8 8,192 MHz
FMB2
The time slots 0/1 and 2/3 are used only
2 kHz
The MSB will be sent first There is no alignment of message bytes to the time slots marked by the FMB.
Fig. 46 Timing diagram S3
64
SN1127EU13SN_0001
Switching Network D (SND)
3
Siemens
Software Functions
SN1127EU13SN_0001
65
Siemens
3.1
Switching Network D (SND)
Test and Diagnostics
The SND provides extensive self-test capabilities during normal operation. This includes in particular the online supervision of speech channels, which allows to sacrifice the MML command group TEST SN/TSG/SSG needed for SNA and SNB. Those continuous tests are run autonomously by the SND hardware and firmware and do not underlay CP control. Error findings result in spontaneous fault messages. Test activities can also be invoked from CP side l
as an additional sanity check on occasion of other commands (e.g., CONF SN) sent from the CP to the SND
l
on occasion of MML commands initiated for the special purpose of diagnosing SN components (DIAG SN)
l
on occasion of audits
Activities not directly related to SND internal units are the measures to verify the SGC channels, like CYCLE commands and HDLC protocol supervision. Diagnostics initiated by MML command require that the diagnosed unit is brought to status MBL first. The SND firmware interface allows to diagnose l
the hardware of a single SND unit separately, independent from other units. This type of test (“all”) does not include speech paths.
l
speech paths extending over multiplexing equipment as well as switching equipment and including optical links. This type of test (“speech”) is defined for an entire plane, because all matrix equipment is not available for redundancy purpose when patterns are looped via OMLs.
It is at the discretion of the issuing MML command if the craft has to issue both types of test separately or if this can also be done in one command. For diagnosis of the SND the following MML-commands are necessary:
66
MML CMD
Duration
Diagnosis for
DIAG SN
10 min
the whole SND
DIAG MATC
1 sec
the MATC
DIAG SNMAT
8 min
the MATC and all MATMs
DIAG MATM
8 min
one MATM,
DIAG SNMUX:TA=LOOPT
5,3 msec
one SNMUX looptest
DIAG SNMUX:TA=HWC
2,5 min
one SNMUX HWC test
SN1127EU13SN_0001
Switching Network D (SND)
Siemens
The MML-commands DIAG MATC/SNMAT/MATM/SNMUX are new and allowed for SND only. They will be rejected in case of SNA/SNB. The MML-command DIAG SN exists already for the SNA/SNB. In case of SND the parameter SUBUNT (subunit) isn’t allowed and for the parameter TA (test area) only HWC or LOOPT (looptest, new) is allowed. The MML-commands TEST SN/TSG/SSG and DIAG TSG/SSG will be rejected in case of SND The TEST MML commands are not implemented for the SND, because the hardware for the SND has internal speech path supervision and the diagnostic MML commands can be used to detect any hardware errors in the SND.
3.2
Best Side Selection (BSS)
Single units of the switching network plane built up redundant pairs, working in a ACT / STB mode. Both units of the pair carries speech, but the LTG takes its speech only from the ACT unit. The new switching network SND does not have that „cross switching“ functionality in-between the two units of a redundant pair, as it is case in the switching network SNA or SNB. That means: the active single unit of a pair on one SND side plane cannot be taken over only by the redundant ( STB ) unit on the other SND plane. Always the ACT /STB states of all units of the entire SND ( all speech channels ) have to be changed. In case of an SND, e.g. the SNMUX-0-0 fails first, all LTGs-0-X to LTGs-3-X of the entire SND are switched over to the other SN side ( all speech paths ), because the ACT / STB states of all SNMUX and MATM has to be changed (see below ). Otherwise the LTGs-0-X and LTGs-1-X can not communicate with the LTGs-2-X and LTGs-3-X ( X = 1....max. 63 ). A second or higher fault in SNA or SNB leads only to a further switch-over of a single unit to its redundant unit of the pair on the other SNA / SNB plane, as it is the case in the first fault. If the second fault is not an outage of the redundant TSG or SSG pair, there is no loss of LTGs at all. On the other hand, a second fault in SND results in a loss of LTGs anywhere: either all LTGs of the first fault or LTGs of the second fault are lost. The only thing, which can done by configuration, is to minimize the loss of active LTGs. This is done by checking which one of the two SND planes is the better one and then switch-over to the better SND plane. That new functionality is called „Best Side Selection“ ( BSS). BSS is done by CP. For best side selection, first CP has to find out the different types of units, connected to SND and second to evaluate their loss. The inward LTG has a higher weight than the a normal LTG. An „inward LTG“ has 2 PCM lines connected to a LIC. All channels of those PCM lines may be used as signaling channels only. Failure of an inward LTG tears down up to 62 signaling channels.
SN1127EU13SN_0001
67
Siemens
68
Switching Network D (SND)
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
LTG 0 - X Speech switch
SNMUX 0-0 ACT -> SG_UNA
LTG 0 - Y Speech switch
SNMUX 0-1 ACT -> STB
MATM 0-0 ACT -> STB
SNMUX 1-0 STB -> ACT
SNMUX 1-1 STB -> ACT
MATM 1-0 STB -> ACT
Fig. 47 Interconnections LTG - SND switching network for DE6.1
SN1127EU13SN_0001
69
Siemens
3.3
Switching Network D (SND)
Path Setup
Call Processing determines the ports and speech channels of the A- and B-side of a call without any knowledge of the switching network type (SNB resp. SND). Afterwards it gives the order to setup the speech path in the switching network by calling the procedure OPPATSE_SELECT_SN_PATH of module PASDA (subsystem SC). For the SND there is no need to do any path hunting in the CP. Thus the procedure OPPATSE only composes the command SETUP PATH BIDIR according the old layout, using the information from call processing, i.e. LTG number and speech channel number of A- and B-side. The command is sent to both sides of the SND by selecting one of the available S3 (MATC) channel for each side from the bit map located in the transient database. The S3 channel selection logic must result in an equal load distribution over the available channels. The introduction of SND offers call processing a maximum of sixteen S3 channels per side (exchange type with a SNMAT) to reach the MATC. The maximum number of channels depends on the MBDHs on the MBD. . An exchange type with only SNMUXs (one or two SNMUXs) has two S3 channels. That means the S3 interface can be connected to the SNMAT (16 channels) or the SNMUX (2 channels). CALLP needs the S3 interface to get access to the switching matrix on the SNMAT or on the SNMUX. Access means a path is available. To determine if a path is available CALLP gets a bit map which states channel on or off. The advantage of the bit map is that CALLP is independent from the DE-type. The bit map is located in the transient database in common memory.
70
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
SND
SNMUX-0-15 126 LTG connections
OML
LILD 0..7
SNMAT-0-0
OML MATM-0-7
SNMUX-0-1 126 LTG connections
OML
LILD 0..7
OML S1.X1
S1.X0
MATM-0-0
SNMUX-0-0 126 LTG connections
LILD 0..7
OML MATC 0-0
OML S3 Interface without SNMAT (max. 2 SNMUXs, always 2 channels )
S1.X0 S1.X1
S3 Interface (with SNMAT, max. 16 channels)
MBD
max. 16 S3 channels, 2 from each MBDH to the MBDCG
MBDH0-0
MBDH0-7
MBDCG0-0
Fig. 48 SND maintenance channels ( S1 & S3 )
SN1127EU13SN_0001
71
Siemens
3.4
Switching Network D (SND)
Cross Office Check (COC)
Speech path setup while establishing a new call includes a COC mechanism which involves Call Processing as well as the LTGs participating in the connection. Before switching the connection through, the selected speech path is tested with a looped pattern. In case of failure there are two trials with other paths before Call Processing gives up and the call attempt is rejected. Errors identified are reported in ADDA messages to FD:COC, which performs two tasks: l
ADDA messages are analyzed and the fault is localized to a configurable unit. After localization the fault is reported to FA:SN in order to initiate configuration of this unit to STB (switchover) or UNA.
l
While TEST SN/TSG/SSG is running, ADDA messages related to the tested units are routed to the testing program. Those errors are not evaluated by FD:COC.
The online speech path supervision of the SND eliminates the need for evaluating ADDA messages to address speech path faults. The COC method depends on traffic density and needs long time to accumulate enough proof for fault localization. The new online mechanism provided by the SND is at least as fast. In addition it is active during the entire call. The online speech path supervision of the SND is also eliminating the MML commands TEST SN/TSG/SSG. Therefore, if an SND is being used, the evaluation of ADDA is not needed any more. Note that another usage of COC is still valid with the SND. This is the MML command START SNBERC. This command allows an operating company to run speech path quality tests for the SN in use.
3.5
Upgrade of SND
A non service affecting upgrade of the SND inside the allowed range defined by the DETYPE can be done by MOD SNDAT and CONF SNMUX commands. Three situations must be distinguished: In case additional LTGs are to be connected and the SNMUX is not fully equipped with LILD the following steps must be executed:
72
l
by CONF SNMUX the SNMUX of one SND side is configured from ACT -> MBL. The system automatically switches the LTGs to the other SND side (if the LTGs are not already switched to that side).
l
by MOD SNDAT the max. number of LTGs connected to the SNMUX is increased. The new max. number of LTGs and thus LILDs is updated in the semipermanent and transient SNMUX database. The additional LILD is plugged.
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
l
by CONF SNMUX the SNMUX is configured back to service from MBL -> ACT. The additional LILD is automatically activated. Note, that the execution of this step may take some time in case of a DE60, because here the SNMUX provides the „switching matrix functionality“ and it therefore has to be updated for all speech connections, which takes some time.
l
having completed the last step the same procedure is repeat for the other SND side.
In case additional LTGs are to be connected to the second SNMUX being in PLA, the procedure quite similar as above, however no deactivation of a SNMUX and switch over of LTGs is necessary: l
by MOD SNDAT the max. number of LTGs connected to the second SNMUX is administered. The max. number of LTGs and thus LILDs is updated in the semipermanent and transient SNMUX database. The required LILD(s) are plugged.
l
by CONF SNMUX the SNMUX is configured from PLA -> MBL -> ACT. The administered LILDs are automatically activated.
l
having completed the last step the same procedure is repeat for the SNMUX within the other SND plane
In case the maximum configuration for one DE Type has been reached and additional LTGs are to be connected an installation recovery must be started for increasing the DE-Type and thus the SND size (see paragraph above). However this is happens very seldom (every 252 LTGs), i.e. once in a few years. Therefore the negative impacts related with such a recovery level are accepted. SND-Ausbaustufen im F:SNMAT MATM 7
SU 1
OML 920
OML 920
MATM 6
OML 920
OML 920
MATM 5
OML 920
OML 920
MATM 4
OML 920
MATC
OML 920
PWR A
MATM 3
OML 920
OML 920
MATM 2
OML 920
OML 920
MATM 1
OML 920
OML 920
MATM 0
OML 920
OML 920
SU 2 SU 3 SU 4 SU 5
OML 71
OML 70 OML 61
OML 60 OML 51
OML 50 OML 41
OML 40
OML 31
OML 30 OML 21
OML 20 OML 11
OML 10 OML 01
OML 00
OML 73
OML 72 OML 63
OML 62 OML 53
OML 52 OML 43
OML 42
OML 33
OML 32 OML 23
OML 22 OML 13
OML 12 OML 03
OML 02
SU 6 SU 7
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
SU 10
Backplane view
2016 LTGs
1764 LTGs
1512 LTGs
1260 LTGs
1008 LTGs
756 LTGs
504 LTGs
OML 920
PWR A
OML 920
SU 9
OML 920
MBC
OML 920
SU 8
252 LTGs
Fig. 49 SND expansion steps in F:SNMAT
SN1127EU13SN_0001
73
Siemens
74
Switching Network D (SND)
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
Contents 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 3 3.1 3.2 3.3 3.4 3.5
Overview Basic System Features Restrictions in V13T SND Configurations MML Commands for SND Output Masks for SND New LTG and LTG-Port Addressing Modified Connection ID in AMA Ticket Hardware Realization Rack and Frame Layout Module MATC Module MATM Module MUXC Module LILD Module OML920 Clock Distribution Architecture Interface MBD/SND Software Functions Test and Diagnostics Best Side Selection (BSS) Path Setup Cross Office Check (COC) Upgrade of SND
SN1127EU13SN_0001
3 4 5 6 10 12 20 24 25 26 42 43 44 48 52 57 60 65 66 67 70 72 72
1
Siemens
2
Switching Network D (SND)
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
1
Overview The innovations of EWSD PowerNode – system architecture and technology Up to 600.000 analog or ISDN basis access (BA) lines
Remote
SI E M ENS NI X DO RF
Multifunctional switchboards, Centrex attendant consoles, inquiry desks
Local DLU 2.000 subs.
V5.1
CP
LTG
IEM S N S E NI XDO R F
DLU
Via V5.1 or V5.2 interfaces Multilink access products V5.1
ISDN PA, n × 64 kbit/s ISDN Intelligent peripheral (IP)
2.000 subs.
V5.2
V5.2* up to 16 PCM30
LTG PA, trunks
S I EM EN S N I XDO R F
Remote switching unit for up to 50.000 subscribers
V5.1
UP to 240.000 digital trunks with CCS or CAS, or analog trunks via SC-MUX
DLU
LTG
RTI
RSU: 50.000 subs.
PA, V5.2, trunks
LTG
SN
100. Erl.
2.016
SC-MUX
Up to 1.500 CCS7 sign.-channels
HTI
LTG
PSM
SSNC
Packet and data networks
100. MSU/s 1.500 links
CCS7 high speed channel Operation and maintenance interface Q3, X.25, LAN
CP
4,0 MBHCA
EWSD innovations
Coordination processor DLU Digital line unit HTI Host time slot interchange LTG Line/trunk group PSM Packet server module RSU Remote switching unit RTI Remote time slot interchange SC-MUX Signal converter multiplexer SN Switching network SSNC Signaling system network control
Fig. 1 The EWSD powernode
The innovations of EWSD PowerNode – higher performance for network consolidation * Reduction of network hierarchies * Powerful nodes with remote units
Innovation
100.
240.
100.
SIEMENS
EWSD
1.500 600.
Today
SIEMENS
SIEM ENS
EWSD
EWSD SIEM ENS
EWSD
4,0 mio 2,7 mio
250.
254
6.500
25.6
60.
SN Erlang
SN ports
SIEM ENS
EWSD
BHCA
EWSD innovations
Subscriber lines
#7 #7 channels MSU/s
Fig. 2 Higher performance with powernode
SN1127EU13SN_0001
3
Siemens
1.1
Switching Network D (SND)
Basic System Features
The SND is a new switching network type for EWSD centra offices. It is part of EWSD Innovation and provides the following improvements: l
Connection of up to 2016 LTGs
l
Allow small configurations up to 63 LTGs
l
Non-blocking design with no path hunt required for single and multi channel connection (each path can be setup any time independent from all other paths)
l
Interworking with MBD only
l
Interworking with LTGA up to LTGN and RSU
l
Support of 128 kbit/s message channel
l
Speech path supervision
l
Better overall MTBF (number of HW faults per port(s))
l
Usable for small switches as well as large switches with a small (16 LTG) growth granularity.
While the old SN types are still in operation, customers have the option to equip new switches with an SND. SNA or SNB switching networks in existing switches may be replaced by SND on demand. A strong motivation might be to extend the switching periphery to more than 504 LTG. But also new smaller switches should be supplied with the new SND because of its additional features, innovative technology, and less space occupation. A message buffer of type MBD is required to connect an SND to the coordination processor CP. The SND switching principle is total new compared to SNB. In general it is a switching matrix (like a grid). The Close-structure (TSSST) is not applied any longer. The SND is fully duplicated for high availability. The SND consists of 2 types of frames: l
the Frame Switching Network MUltipleXer version A (F:SNMUXA) and
l
the Frame Switching Network Matrix (F:SNMAT).
Due to it’s position between the old environment and the new matrix it is possible to get more than one version in the future if the old environment will be modernized. Therefore it is named F:SNMUX version A. In a later F:SNMUX version B an optolink LTG-SND shall reduce the costs of EWSD internal cabling by replacing 16 SDCinterfaces by an optical fiber. In the F:SNMUXA there is a multiplexer and demultiplexer for the existing environment which concentrates 2 x 64 x 8.192 Mbit/s LTG lines to 2 optical links which are connected to the F:SNMAT. In the F:SNMAT the switching is performed. For smaller switches (up to 252 LTGs) the F:SNMUXA is able to be a switch as well.
4
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
MBDH LTG 0-1
.. .
0
LTG 0-63
SNMUX 0
MBDH
.. .
LTG 1-1 127
LTG 1-63
8 Mbit/s SDC interface
.. .
920 Mbit/s optical link
0
920 Mbit/s optical link
1
1 x MBD-S3 (at SN126 LTG)
MBDH LTG 30-1
.. .
0
LTG 30-63
SNMUX 15
MBDH
.. .
LTG 31-1 127
LTG 31-63
.. .. ..
920 Mbit/s optical link
30
920 Mbit/s optical link
31
2 x MBD-S1
SNMAT
1 x MBD-S3 MBD CP
Fig. 3 SND basic system block diagram
1.2
Restrictions in V13T
l
In version V13T, the maximum number of 2016 LTGs at SN D is not released to customers; it is restricted to 1008 LTGs. Numbers higher than 1008 will be used for internal test purpose. The full range of 2016 LTGs at SN D is released in a later version, e.g. in V15.
l
The number of trunks has been increased from 65534 by factor 4 to 131070 (1008 LTGs) respectively 262140 (2016 LTGs). The number of trunks per trunk group as well as the number of trunk groups per exchange, trunk group number (TGNO), line number (LNO), circuit identification code (CIC), announcement lines and groups are not extended in V13T.
l
In version V13T no DLUs and V5IFs can be connected to LTGs with numbers higher than LTG = 7-63 i.e. internal numbers higher than 511. That means, that no subscribers and PBX lines can be created at the new high equipment numbers. No functions related to subscribers, for example packet data, are possible at the high LTG numbers.
SN1127EU13SN_0001
5
Siemens
Switching Network D (SND)
l
In version V13T only LTG types needed in trunk exchanges (i.e. LTGC and LTGD) can be connected to LTGs with higher number than LTG = 7-63, i.e. no LTGA, LTGH or other types for local exchanges.
l
In version V13T ports needed for operator consoles (OSS and ADMOSS) cannot be created at LTGs with higher numbers than LTG = 7-63 .
l
In V13T no wake up ports can be created at LTG with higher number than LTG = 7-63.
l
No CCNC is possible together with SND and large LTG numbers.
l
In a combined exchange with V13T (trunks and subscribers) not all objects can be measured by traffic measurement.
l
No test of trunks with ATME is possible for trunks connected to LTGs with higher number than LTG = 7-63.
l
No charging functions, which need tariff switchover in LTGs higher than 7-63 should be done in V13T exchanges. Accuracy of tariff switchover is not guaranteed for those high LTG numbers.
l
No multichanel switching for nx64 kbit/s (n<30) yet.
1.3
SND Configurations
Depending on the current capacity stage, only the F:SNMUXA is used for up to 252 LTGs (up to 2 F:SNMUXA), or the F:SNMUXA and the F:SNMAT are used (up to 16 F:SNMUXA and 1 F:SNMAT for up to 2016 LTGs). The modules of a F:SNMUXA are: M:LILD: Link interface module LTG type D The M:LILD is the interface to the LTG and MBDH (MCH interface). It is responsible for propagation time equalization of the SDC:LTG. It merges 16 SDC inputs of 8 Mbit/s to one high speed link with 184,32 Mbit/s. The reason for the additional bitrate is explained later. M:MUXC: Multiplex control module The M:MUXC receives/transmits the 184,32 Mbit/s highway data to/from the M:LDID modules depending on the system configuration: l
to/from the M:LILD in a system configuration of < 126 LTGs
l
to/from a second F:SNMUX(A) via M:OML920 in a system configuration of > 126 LTGs and <252 LTGs
l
to/from a F:SNMAT via M:OML920 in a system configuration of > 252 LTGs
The M:MUXC controls the 8 M:LILD and 2 M:OML920 over HDLC-links of 2 Mbit/s.
6
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
0 MBDH 1
...
LILD 0
64
LTG
127
. .MBDH . LTG
LILD 7
MUXC
SNMUX
Fig. 4 SND configurations for up to 126 LTG
The main switching network SND (EWSD) consists in its bigger expansion stages of two parts called SNMUX and SNMAT. The optical link module OML920 provides the data connection between these two parts. In a smaller expansion stage the SND consists of two SNMUX which are directly connected by the OML920. M:OML920: Optical Multiplexer Link module for a serial data rate of 920Mbit/s The optical multiplexer link module OML920 is a transparent transceiver backplane module. Four electrical data streams with 184.32 Mbit/s each are transmitted from one OML920 module to another OML920 module by an optical fiber. It provides a bidirectional data connection with a fiber length up to 200m. Growth is possible, gradually with different impact on the service. LILD can be added without service impact as long as there are free slots in an SNMUX. An SNMUX can be added without service impact, but the limit for each DE type is shown in the table below. Crossing the border of a DE type is achieved by a sort of APS changeover. The modification of the DE type can only be done in an installation recovery in the split system half.
SN1127EU13SN_0001
7
Siemens
max # of
Switching Network D (SND)
DE TYPE
max # of max # of # of SNMUX LILD MATM
max # of MBDH
252
DE6.0
2
16
0
1
252
DE6.1 *)
2
16
1
1
504
DE6.2
4
32
2
2
756
DE6.3
6
48
3
3
1,008
DE6.4
8
64
4
4
1,260
DE6.5
10
80
5
5
1,512
DE6.6
12
96
6
6
1,764
DE6.7
14
112
7
7
2,016
DE6.8
16
128
8
8
LTGs
*) DE6.0 should be taken instead of DE6.1, because with no MATM and no MATC it is the cheaper solution.
0
LTG
1
...
MBDH
... LTG
64
LILD 0 OML920
.
MBDH
0
LILD 7 OML920
127
1
MUXC1
SNMUX 0 0
LTG
1
...
MBDH
... LTG
LILD 0 OML920
.
MBDH
64
LILD 7
127
MUXC
0 OML920 1
SNMUX 1 SND configuration up to 252 LTG Fig. 5 SND configurations for up to 256 LTG
8
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
Up to 16 F:SNMUX can be connected to a frame F:SNMAT. The modules of a F:SNMAT are: M:MATM Matrix module In F:SNMAT the switching matrix is made of 8 M:MATM for enlargement in linear equal steps. Each module contains a switch 128 inputs to 16 outputs. 8 modules combined forms a switch with 128 inputs to 128 outputs (128 # 128, that sign # means a matrix) where each input is connected onto each module which is an important realization detail of the matrix. 8 modules with 16 outputs each are the required 128 outputs. In each crossing point of the matrix there is a Time Stage Circuit realized for 32 inputs by the ASIC TSC32 which contains a space stage 32 # 4 as well. Each M:MATM module contains ASICs for equalization memories, which have no switching functionality but they are necessary to align all incoming signals from op to 16 F:SNMUXA with different locations and cable length between 0 and 200 meters. M:MATC Matrix control module The controller M:MATC performs the preprocessing for the path setup commands received from CP via the MBD-interface and distributes the information to the controllers on the modules M:MATM via a 2 Mbit/s HDLC link. The clock generator and 5 V power supply for the entire frame are located also on M:MATC.
0
LTG
1
... MBDH ... LTG
LILD 0 OML920
OML920
0
64
LILD 7
127
MUXC
OML920
MATM 0 OML920
1
...
MBDH
...
SNMUX 0
MBDH
0
LTG
1
... MBDH ... LTG
MATM 7
LILD 0 OML920
OML920
0
64
LILD 7
127
MUXC
OML920
SNMUX 15
1
OML920 MATC SNMAT
Fig. 6 SND configurations for up to 2016 LTG
SN1127EU13SN_0001
9
Siemens
1.4
Switching Network D (SND)
MML Commands for SND
For the SND a few MML commands have been introduced, some have changed and a small number is no longer needed. The MML configurable logical units of the SND are SN, SNMAT. The configurable physical units are MATC, MATM and SNMUX. The logical objects SN and SNMAT are introduced to simplify the execution of maintenance functions. By these objects a collective set of hardware equipment can be addressed within one maintenance command. The physical units MATC, MATM, SNMUX represent the hardware objects being really configured, alarmed and repaired. They can consist of more than one board or hardware equipment assigned (e.g. SNMUX consist of MUXC, LILDs, OML assigned to the SNMUX). For alarming of the new units there are 3 new objects classes introduced:
10
l
MATC
l
MATM
l
SNMUX
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
The following MML commands have been introduced for SND: l
to expand in steps of 252 LTGs (only in installation recovery):
ENTR EXDDAT:
DETYPE=...;
As SND introduces additional values for DETYPE in EWSD V13T the new values DE60, DE61, DE62, DE63, DE64, DE65, DE66, DE67 and DE68 are added in parameter DETYPE of MML-command ENTR EXDDAT. l
to expand and to modify alarm profile for components MATC, MATM, SNMUX:
MOD SNDAT:
SN=..., [ALPROF=...,] [LTGMAX=0...126,] UNIT= TSG-0...7 or SNMUX-0...15 or MATC or MATM-0...7 or X
This command also replaces the old command MOD TSG. l
to display Alarm Profile for all SND units, DE Type, max. MATM, max:
DISP SNDAT: SN=...;
SN SNMAT
SNMUX 0 MATM 0
SNMUX 1
· SNMUX 15
configurable physical unit
· MATM 7
MATC
configurable logical unit
Fig. 7 Logical and physical units of SND
SN1127EU13SN_0001
11
Siemens
l
Switching Network D (SND)
to configure MATC, MATM together, otherwise single commands:
When this command, the physical units MATC and MATM must have the same current state or some units may have already the desired state, otherwise the command will be rejected. CONF SNMAT: SN=..., OST=...; l
to diagnose MATC, MATM together, otherwise (time expensive) single:
DIAG SNMAT: l
SN=...;
to configure/diagnose MATC:
CONF MATC:
SN=...,MATC=..., OST=...;
DIAG MATC:
SN=...,MATC=...;
l
to configure/diagnose MATM:
CONF MATM:
SN=..., MATM=..., OST=...;
DIAG MATM:
SN=...,MATM=...;
l
to configure/diagnose SNMUX:
CONF SNMUX: SN=..., SNMUX=..., OST=...; DIAG SNMUX: l
SN=..., SNMUX=..., TA= HWC or LOOPT;
to configure SN:
In case of SND a new path of command CONF SN may be used to specify the SN side for the selection of speech channels. The user may specify side 0, side 1, or best side selection BSS (selection will be done by software). CONF SN:
1.5
SN=..., SPCHSIDE= 0 or 1 or BSS;
Output Masks for SND
1.5.1
Display of Exchange Description Data
T53/0000530_530/DBPXEK0V2440-PC1/013 0362 OMT-01/REM#1 2992/01952 DISPEXDDAT;
99-08-12
13:12:31 EXEC'D
EXCHANGE DESCRIPTION DATA CNTRY GNTYPE DETYPE MET Q3ACTIVE ENTITY CMYSIZE CONFIG -------+----------+-------+----------+---------+-------+--------+------BRD DE64 YES 256 CPMP END JOB 0362
12
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
1.5.2
Display of SN Data
T53/0000530_530/DBPXEK0V2440-PC1/013 0945 OMT-01/REM#1 3102/09664
99-08-12
13:13:36
99-08-11
14:03:01
DISPSNDAT; SN-TYPE: SND SN UNIT LTGMAX ALPROF ALSTAT ----+--------+-------+--------+------0 MATC MAJESC 0 MATM - 0 MAJESC 0 MATM - 1 MAJESC 0 MATM - 2 MAJESC 0 MATM - 3 MAJESC 0 SNMUX- 0 128 MAJESC ALOUTS 0 SNMUX- 1 128 MAJESC 0 SNMUX- 2 128 MAJESC 0 SNMUX- 3 128 MAJESC 0 SNMUX- 4 128 MAJESC 0 SNMUX- 5 128 MAJESC ALOUTS 0 SNMUX- 6 128 MAJESC ALOUTS 0 SNMUX- 7 128 MAJESC 1 MATC MAJESC 1 MATM - 0 MAJESC 1 MATM - 1 MAJESC 1 MATM - 2 MAJESC 1 MATM - 3 MAJESC 1 SNMUX- 0 128 MAJESC 1 SNMUX- 1 128 MAJESC ALOUTS 1 SNMUX- 2 128 MAJESC 1 SNMUX- 3 128 MAJESC 1 SNMUX- 4 128 MAJESC 1 SNMUX- 5 128 MAJESC ALOUTS 1 SNMUX- 6 128 MAJESC 1 SNMUX- 7 128 MAJESC END JOB 0945 EXEC'D
1.5.3
Status of SN
T53/DBPXEK0V2440-000/203 0388 OMT-00/REM#0
3080/09683
STATSN;
EXEC'D
THE LTGS SELECT SPEECH CHANNELS FROM SN SN UNIT
-0
LTG SET MB UNIT FROM TO -------------+-----+--------------+--------------+----------MATC -0 ACT MATM -0 -0 ACT MATM -0 -1 ACT MATM -0 -2 ACT MATM -0 -3 ACT
SN1127EU13SN_0001
OST
13
Siemens
Switching Network D (SND)
SNMUX-0 -0
ACT
SNMUX-0 -1
ACT
SNMUX-0 -2
ACT
SNMUX-0 -3
ACT
SNMUX-0 -4
ACT
SNMUX-0 -5
ACT
SNMUX-0 -6
PLA
SNMUX-0 -7
ACT
MATC -1 MATM -1 MATM -1 MATM -1 MATM -1 SNMUX-1
-0 -1 -2 -3 -0
STB STB STB STB STB STB
SNMUX-1 -1
STB
SNMUX-1 -2
STB
SNMUX-1 -3
STB
SNMUX-1 -4
STB
SNMUX-1 -5
STB
SNMUX-1 -6
ACT
SNMUX-1 -7
STB
LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG
-0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15
-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG
-0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15
-63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63
MBIH -0 -0
LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG
-0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15
-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG LTG
-0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15
-63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63 -63
MBIH -1 -0
MBIH -0 -1
MBIH -0 -2
MBIH -0 -3
MBIH -1 -1
MBIH -1 -2
MBIH -1 -3
END JOB 0388 DISPEXDDAT;
EXEC'D
EXCHANGE DESCRIPTION DATA CNTRY GNTYPE DETYPE MET Q3ACTIVE ENTITY CMYSIZE CONFIG -------+----------+-------+----------+---------+-------+--------+------DE60 YES CPMP END JOB 0281 STATSN;
EXEC'D
THE LTGS SELECT SPEECH CHANNELS FROM SN SN UNIT
-0
LTG SET MB UNIT FROM TO -------------+-----+--------------+--------------+----------SNMUX-0 -0 ACT LTG -0 -1 LTG -0 -63 MBIH -0 -0
14
OST
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
SNMUX-0 -1
ACT
SNMUX-1 -0
STB
SNMUX-1 -1
STB
LTG LTG LTG LTG LTG LTG LTG
-1 -2 -3 -0 -1 -2 -3
-1 -1 -1 -1 -1 -1 -1
LTG LTG LTG LTG LTG LTG LTG
-1 -2 -3 -0 -1 -2 -3
-63 -63 -63 -63 -63 -63 -63
MBIH -1 -0
END JOB 0282
1.5.4
Status of LTGs
T53/DBPXEK0V2440-000/203 0383 OMT-00/REM#0
3080/09682
99-08-11
STATLTG:LTG=14; LTG OST CH0 CH1 -----------------14 -1 PLA 14 -4 PLA 14 -7 PLA 14 -10 PLA 14 -13 PLA 14 -16 PLA 14 -19 PLA 14 -22 PLA 14 -25 PLA 14 -28 PLA 14 -31 PLA 14 -34 PLA 14 -37 PLA 14 -40 PLA 14 -43 PLA 14 -46 PLA 14 -49 PLA 14 -52 PLA 14 -55 PLA 14 -58 PLA 14 -61 PLA
EXEC'D LTG OST CH0 CH1 -----------------14 -2 PLA 14 -5 PLA 14 -8 PLA 14 -11 PLA 14 -14 PLA 14 -17 PLA 14 -20 PLA 14 -23 PLA 14 -26 PLA 14 -29 PLA 14 -32 PLA 14 -35 PLA 14 -38 PLA 14 -41 PLA 14 -44 PLA 14 -47 PLA 14 -50 PLA 14 -53 PLA 14 -56 PLA 14 -59 PLA 14 -62 PLA
END JOB 0383 T53/DBPXEK0V2440-000/203 0293 OMT-00/REM#0
LTG OST CH0 CH1 -----------------14 -3 PLA 14 -6 PLA 14 -9 PLA 14 -12 PLA 14 -15 PLA 14 -18 PLA 14 -21 PLA 14 -24 PLA 14 -27 PLA 14 -30 PLA 14 -33 PLA 14 -36 PLA 14 -39 PLA 14 -42 PLA 14 -45 PLA 14 -48 UNA UNA UNA 14 -51 PLA 14 -54 PLA 14 -57 PLA 14 -60 PLA 14 -63 PLA
3080/09682
99-08-12
STATLTG:LTG=X; LTG OST CH0 CH1 -----------------0 -1 PLA 0 -4 ACT NAC ACT 0 -7 ACT NAC ACT 0 -10 PLA 0 -13 SEZ SEZ UNA 0 -16 SEZ SEZ UNA 0 -19 SEZ SEZ UNA 0 -22 PLA 0 -25 ACT NAC ACT
SN1127EU13SN_0001
13:57:31
09:09:12 EXEC'D
LTG OST CH0 CH1 -----------------0 -2 PLA 0 -5 ACT NAC ACT 0 -8 SEZ SEZ UNA 0 -11 PLA 0 -14 SEZ SEZ UNA 0 -17 SEZ SEZ UNA 0 -20 ACT NAC ACT 0 -23 ACT NAC ACT 0 -26 ACT NAC ACT
LTG OST CH0 CH1 -----------------0 -3 ACT NAC ACT 0 -6 ACT NAC ACT 0 -9 PLA 0 -12 PLA 0 -15 SEZ SEZ UNA 0 -18 SEZ SEZ UNA 0 -21 PLA 0 -24 ACT NAC ACT 0 -27 PLA
15
Siemens
0 0 0 0 0 0 0 0 0 0 0 0
-28 -31 -34 -37 -40 -43 -46 -49 -52 -55 -58 -61
Switching Network D (SND)
ACT PLA PLA ACT ACT PLA ACT ACT PLA ACT ACT ACT
NAC ACT NAC ACT NAC ACT NAC ACT NAC ACT NAC ACT NAC ACT NAC ACT
0 0 0 0 0 0 0 0 0 0 0 0
-29 -32 -35 -38 -41 -44 -47 -50 -53 -56 -59 -62
ACT PLA ACT PLA PLA ACT SEZ PLA ACT ACT PLA PLA
NAC ACT NAC ACT NAC ACT SEZ UNA NAC ACT NAC ACT
0 0 0 0 0 0 0 0 0 0 0 0
-30 -33 -36 -39 -42 -45 -48 -51 -54 -57 -60 -63
ACT ACT PLA PLA PLA PLA MBL PLA PLA PLA MBL ACT
NAC ACT NAC ACT
UNA UNA
UNA UNA NAC ACT
END TEXT JOB 0293 T53/DBPXEK0V2440-000/203 0293 OMT-00/REM#0
3080/09682
99-08-12
STATLTG:LTG=X; LTG OST CH0 CH1 -----------------2 -1 ACT NAC ACT 2 -4 PLA 2 -7 PLA 2 -10 PLA 2 -13 PLA 2 -16 PLA 2 -19 PLA 2 -22 PLA 2 -25 PLA 2 -28 PLA 2 -31 ACT NAC ACT 2 -34 PLA 2 -37 PLA 2 -40 PLA 2 -43 PLA 2 -46 PLA 2 -49 PLA 2 -52 PLA ... END TEXT JOB 0293
1.5.5
09:09:17 EXEC'D
LTG OST CH0 CH1 -----------------2 -2 PLA 2 -5 PLA 2 -8 PLA 2 -11 PLA 2 -14 PLA 2 -17 PLA 2 -20 PLA 2 -23 PLA 2 -26 PLA 2 -29 PLA 2 -32 PLA 2 -35 PLA 2 -38 PLA 2 -41 PLA 2 -44 PLA 2 -47 PLA 2 -50 PLA 2 -53 PLA
LTG OST CH0 CH1 -----------------2 -3 PLA 2 -6 PLA 2 -9 PLA 2 -12 PLA 2 -15 PLA 2 -18 PLA 2 -21 PLA 2 -24 PLA 2 -27 PLA 2 -30 PLA 2 -33 PLA 2 -36 PLA 2 -39 PLA 2 -42 PLA 2 -45 PLA 2 -48 PLA 2 -51 PLA 2 -54 PLA
Configuration of SNMUX
T53/DBPXEK0V2440-000/203 0169 OMT-00/REM#0
3077/06611
99-08-11
CONFSNMUX:SN=1,SNMUX=6,OST=ACT; STARTING CONFIGURATION FOR SNMUX-1
15:39:28 ACCEPTED
-6
FROM MBL TO ACT
END TEXT JOB 0169 T53/DBPXEK0V2440-000/203 0169 OMT-00/REM#0 CONFSNMUX:SN=1,SNMUX=6,OST=ACT;
16
3076/06609
99-08-11
15:43:07 EXEC'D
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
END OF CONFIGURATION FOR SNMUX-1
-6
FROM MBL TO ACT
END TEXT JOB 0169 T53/DBPXEK0V2440-000/203 0169 OMT-00/REM#0
3076/00007
99-08-11
CONFSNMUX:SN=1,SNMUX=6,OST=ACT;
15:43:08 EXEC'D
END JOB 0169
1.5.6
Configuration of MATC
T53/DBPXEK0V2440-000/203 0268 OMT-00/REM#0
3077/06611
99-08-11
CONFMATC:MATC=1,OST=MBL; STARTING CONFIGURATION FOR MATC -1
15:56:14 ACCEPTED
FROM ACT TO MBL
END TEXT JOB 0268 T53/DBPXEK0V2440-000/203 0268 OMT-00/REM#0
3078/09199
99-08-11
CONFMATC:MATC=1,OST=MBL;
15:56:53 WAITING
CAUTION: THIS REQUEST END TEXT JOB 0268 0268 DO YOU WANT THIS CONFIGURATION TO BE EXECUTED ?
MASKNO:12467
(YES: +/NO: -) < + T53/DBPXEK0V2440-000/203 0268 OMT-00/REM#0
3076/06609
99-08-11
CONFMATC:MATC=1,OST=MBL; END OF CONFIGURATION FOR MATC -1
15:57:01 EXEC'D
FROM ACT TO MBL
END TEXT JOB 0268 T53/DBPXEK0V2440-000/203 0268 OMT-00/REM#0 CONFMATC:MATC=1,OST=MBL; END JOB 0268
SN1127EU13SN_0001
3076/00007
99-08-11
15:57:02 EXEC'D
17
Siemens
Switching Network D (SND)
T53/DBPXEK0V2440-000/203 0271 OMT-00/REM#0
3080/09683
99-08-11
STATSN;
EXEC'D
THE LTGS SELECT SPEECH CHANNELS FROM SN SN UNIT
15:57:17
-0
OST
LTG SET MB UNIT FROM TO -------------+-----+--------------+--------------+----------MATC -0 ACT MATM -0 -0 ACT MATM -0 -1 ACT MATM -0 -2 ACT MATM -0 -3 ACT SNMUX-0 -0 ACT LTG -0 -1 LTG -0 -63 MBIH -0 -0 LTG -1 -1 LTG -1 -63 SNMUX-0 -1 ACT LTG -2 -1 LTG -2 -63 LTG -3 -1 LTG -3 -63 SNMUX-0 -2 ACT LTG -4 -1 LTG -4 -63 MBIH -0 -1 LTG -5 -1 LTG -5 -63 SNMUX-0 -3 ACT LTG -6 -1 LTG -6 -63 LTG -7 -1 LTG -7 -63 SNMUX-0 -4 ACT LTG -8 -1 LTG -8 -63 MBIH -0 -2 LTG -9 -1 LTG -9 -63 SNMUX-0 -5 ACT LTG -10 -1 LTG -10 -63 LTG -11 -1 LTG -11 -63 SNMUX-0 -6 DST LTG -12 -1 LTG -12 -63 MBIH -0 -3 LTG -13 -1 LTG -13 -63 SNMUX-0 -7 ACT LTG -14 -1 LTG -14 -63 LTG -15 -1 LTG -15 -63 MATC -1 MBL MATM -1 -0 NAC MATM -1 -1 NAC MATM -1 -2 NAC MATM -1 -3 NAC SNMUX-1 -0 STB LTG -0 -1 LTG -0 -63 MBIH -1 -0 LTG -1 -1 LTG -1 -63 SNMUX-1 -1 STB LTG -2 -1 LTG -2 -63 LTG -3 -1 LTG -3 -63 SNMUX-1 -2 STB LTG -4 -1 LTG -4 -63 MBIH -1 -1 LTG -5 -1 LTG -5 -63 SNMUX-1 -3 STB LTG -6 -1 LTG -6 -63 LTG -7 -1 LTG -7 -63 SNMUX-1 -4 STB LTG -8 -1 LTG -8 -63 MBIH -1 -2 LTG -9 -1 LTG -9 -63 SNMUX-1 -5 STB LTG -10 -1 LTG -10 -63 LTG -11 -1 LTG -11 -63 SNMUX-1 -6 ACT LTG -12 -1 LTG -12 -63 MBIH -1 -3 LTG -13 -1 LTG -13 -63 SNMUX-1 -7 STB LTG -14 -1 LTG -14 -63 LTG -15 -1 LTG -15 -63 END JOB 0271
18
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
1.5.7
Configuration of SN
T53/DBPXEK0V2440-000/203 0173 OMT-00/REM#0
3077/00006
99-08-11
CONFSN:SPCHSIDE=1;
15:45:49 STARTED
END TEXT JOB 0173 T53/DBPXEK0V2440-000/203 0173 OMT-00/REM#0
3076/00007
99-08-11
CONFSN:SPCHSIDE=1;
15:45:55 EXEC'D
END JOB 0173 T53/DBPXEK0V2440-000/203 0175 OMT-00/REM#0
3080/09683
99-08-11
STATSN;
EXEC'D
THE LTGS SELECT SPEECH CHANNELS FROM SN SN UNIT
15:46:16
-1
LTG SET MB UNIT FROM TO -------------+-----+--------------+--------------+----------MATC -0 STB MATM -0 -0 STB MATM -0 -1 STB MATM -0 -2 STB MATM -0 -3 STB SNMUX-0 -0 STB LTG -0 -1 LTG -0 -63 MBIH -0 -0 LTG -1 -1 LTG -1 -63 SNMUX-0 -1 STB LTG -2 -1 LTG -2 -63 LTG -3 -1 LTG -3 -63 SNMUX-0 -2 STB LTG -4 -1 LTG -4 -63 MBIH -0 -1 LTG -5 -1 LTG -5 -63 SNMUX-0 -3 STB LTG -6 -1 LTG -6 -63 LTG -7 -1 LTG -7 -63 SNMUX-0 -4 STB LTG -8 -1 LTG -8 -63 MBIH -0 -2 LTG -9 -1 LTG -9 -63 SNMUX-0 -5 STB LTG -10 -1 LTG -10 -63 LTG -11 -1 LTG -11 -63 SNMUX-0 -6 DST LTG -12 -1 LTG -12 -63 MBIH -0 -3 LTG -13 -1 LTG -13 -63 SNMUX-0 -7 STB LTG -14 -1 LTG -14 -63 LTG -15 -1 LTG -15 -63 MATC -1 ACT MATM -1 -0 ACT MATM -1 -1 ACT MATM -1 -2 ACT ... END JOB 0175
SN1127EU13SN_0001
OST
19
Siemens
1.6
Switching Network D (SND)
New LTG and LTG-Port Addressing
With introduction of new switching network SN D, it is possible to enlarge the number of LTGs in an exchange from 504 in EWSD classic up to 2016 (later 8064 LTGs are planned with another new SN) within EWSD PowerNode. The number of DLUs and V5IFs will grow with a similar factor. This enlargement makes it necessary to address the higher number of HW units and the located ports internally and by operators via MML. The existing address mechanisms are limited to 504 LTG (addressed with TSG 0...7 and LTG 1..63 per TSG), 255 DLUs and 3000 V5 interfaces. Equipment numbers of the ports can be addressed in existing versions only to the same extension. Therefore an enhancement for numbering/addressing for all types of ports has to be done. In V13T the enhanced addressing is only realized for LTGs and LTG ports to be able to deliver large trunk switches. It’s also planned to connect subscribers in this switch, but the DLUs, OSS and V5 interfaces will be connected to the first 504 LTGs and so it’s not necessary to change the addresses for these units in V13T. In a later version, a synonymous step is done for DLU, OSS and V5.x interfaces for large subscriber exchanges. For V13T only an amount of 1008 LTGs will be released to the customer, because no dynamical optimization is done for this version. But for this version it is already possible to create HW-units and trunks, in all 2016 LTG’s. The addressing scheme at MML interface is changed , instead of one parameter EQN for equipment number two parameters are used. The existing numeric values of the parameter units are kept. For example, ports with EQN = 1- 2- 3- 4 at existing LTG = 1-2 with internal number 66 at SN B keeps this external and internal number in V13T at SN D. However, the input of LTG has to be done within an other MML parameter. This new LTG - addressing scheme is introduced for all types of exchanges in V13T.
20
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
Old Format of parameter LTG/PLF:
New Format of parameter LTG/PLF:
LTG = tsg - ltg PLF = tsg - ltg
LTG = ltgset - ltg PLF = ltgset - ltg
where
where tsg: 0...7 ltg: 1...63
ltgset: 0...31 ltg: 1...63
Fig. 8 Format of MML parameter LTG / PLF
Old Format of parameter EQN:
New Format of parameter LTG and LC:
EQN = tsg - ltg - ltu - channel where tsg: 0...7 ltg: 1...63 ltu: 0...7 channel: 0...31
LTG = where
ltgset - ltg, LC = ltu - channel ltgset: ltg: ltu: channel:
0...31 1...63 0...7 0...31
Fig. 9 Format of MML parameter EQN
Old Format of parameter PDCLNK:
New Format of parameter LTG and PDCLNK :
PDCLNK = tsg - ltg - ltu or dlu - slmx - id - pcm where tsg: 0...7 ltg: 1...63 ltu: 0...4 dlu: 10...2550 slmx-id: 0...15 pcm: 0...1
LTG = ltgset - ltg, PDCLNK = ltu or DLU = dlu, PDCLNK = slmx_id - pcm where ltgset: 0...31 ltg: 1...63 ltu: 0...4 dlu: 10...2550 slmx-id: 0...15 pcm: 0...1
Fig. 10 Format of MML parameter PDCLNK
SN1127EU13SN_0001
21
Siemens
Switching Network D (SND)
New Parameters for LTG Ports The old output format of EQN is changed in the new output format LTG and LC. For all outputs which includes the parameter PDCLNK a new parameter EQT which describes the type (LTG or DLU) is inserted. The old output length of LTG / PLF number is enlarged by 2 digits. LTG
LINE TRUNK GROUP This parameter only accepts a single value entry. a-b a: LINE TRUNK GROUP SET 0...31, range of decimal numbers Dependent on the Switching Network Hardware this unit represents the Time Stage Group (TSG for SNB) or the Switching Network MULTIPLEXER (SNMUX for SND and upper ones). b: LINE TRUNK GROUP NUMBER 1...63, range of decimal numbers
LC
LINE CONNECTION This parameter only accepts a single value entry. a-b a: LINE TRUNK UNIT 0...7, range of decimal numbers b: CHANNEL 0...31, range of decimal numbers
22
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
LTG 0-1
0 1
0 - 63
63 64 65
...
1-1
...
SNMUX 0
126
1 - 63
...
0 1
30 - 1
SN D
15
63 64 65
30 - 63 31 - 1
126
31 - 63
MBDH 7 MBU:LTG
0 - 28
MBU:LTG
0 - 29
... MBDH 0 MBU:LTG
0-0
MBU:LTG
0-1
MBU:LTG
0-2
MBU:LTG
0 - 30
MBU:LTG
0 - 31
MBD
MBU:LTG
0-3
Fig. 11 LTG configuration with SN(D) DE6/8 (up to 2016 LTGs)
All MML-commands and output masks which include the parameters LTG and EQN for LTG-HW units and trunks are changed to a new format. The units which are not needed in trunk exchanges (e.g. (CTX-)subscribers, PA/BA, V5IF, OSS, ...) still remain in the old format and will be changed in later version. For version V13T these units only can be connected to the first 504 LTGs. The following objects have changed MML commands: LTG and sub-units (CR, LTU, TOG, COU, PH ...) LTG, LTU, CRMOD, MDTOG, CONFL, CONFRNC, COU Trunks, Announcements, ... GTCPT, GTDEST, NUC, OCANEQ, OCAVAR, PDCLNK, PORT, ROUDB, TRUNK, FHM, PDCCHR, PDCCNTL, PDCPERF, PHONMEET
SN1127EU13SN_0001
23
Siemens
Switching Network D (SND)
Testequipment CTYPE, EQTRAP, LCVAR, TRAPS, TSTCALL, TSTOBJ Fault Analysis, Traffic measurement, Utilities and Tracer CALLDAT, CALLMON, CALLTRAC, CLSTTRAC, CONN, CSF, ERRSTDAT, GP, GPELEM, LTGIMDMP, LTGPRPCH, LTGRES, OVLD, SIGNTRAC There are a lot of output masks for Recoveries, Alarming, Audits, ... which also includes the LTG or EQN number. They are enhanced due to increase of LTG numbers.
1.7
Modified Connection ID in AMA Ticket
The connection ID is a unique identification of one call, that means: l
at one point of time, all different calls in one exchange have a different connection ID.
l
all tickets for one call (AMA tickets, MOB tickets, IACAMA tickets and IN AMA tickets) get the same connection ID.
l
It is guaranteed that the same Connection Id will not appear again after at least 5 days in version 12. This estimation is based on the highest possible traffic in EWSD. In case of normal traffic, the same Connection Id will appear again after a much longer period.
The current connection ID has the following structure (part of the current data package 25): length (bits)
Content
9
LTG number (or zero if built by CP)
23
GP-counter / CP-counter
The total length of the connection ID is not changed. As the range of LTG number is now 1-2047 ,the counter is reduced to 21 bit. Reducing the counter by two bits means that the connection ID can return faster. e.g. instead of 5 days it would be possible that the connection id number returns the next day.
24
SN1127EU13SN_0001
Switching Network D (SND)
2
Siemens
Hardware Realization
Fig. 12
SN1127EU13SN_0001
25
Siemens
2.1
Switching Network D (SND)
Rack and Frame Layout
Each field represents a frame and each column represents a rack. Max. 4 free fields may be filled with LTGs, MBUs, CCGs and so on.
F:SNMUXA 0 F:SNMUXA 1
Fig. 13 SND 126 LTGs: 2 frames
26
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
F:SNMUXA 0
F:SNMUXA 0
F:SNMUXA 1
F:SNMUXA 1
Fig. 14 SND 252 LTGs: 2 frames
0
1
2
F:SNMUXA 0
F:SNMUXA 0
F:SNMUXA 0
F:SNMUXA 1
F:SNMUXA 1
F:SNMUXA 1
15
...
F:SNMUXA 0
FAN-TRAY
F:SNMUXA 1
F:SNMAT 0 F:SNMAT 1 F:AUB-C F:CU-C FAN-BOX
Fig. 15 SND 2016 LTGs: 34 frames
SN1127EU13SN_0001
27
Siemens
Switching Network D (SND)
Retrofit means the replacement of an old SNA or SNB by a new SND. The major reason of distributing the SND over multiple frames is the maximum amount of cables (approx. 200) to be fed into an EWSD rack. In case of an enlargement of an existing SN up to 504 LTGs, various old existing LTG versions have to be connected and also the more compact LTGN might be used to fill up the required number of LTGs. For small SNDs (up to 252 LTGs) no F:SNMAT frame is necessary. The old TSGB frames of an SNB can be replaced by a F:SNMUXA frame witch is able to connect twice as much LTGs than a TSGB. The existing LTG cables might be reused due to the layout of the backplanes. Just a small (appr. 30 mm) offset in X direction of the connectors places occurs. Each second rack shall be held free in case of an SNB larger than 126 LTGs due to the higher density of SND. In this free place a rearranging backplane (F:SNCARE) might be build in to connect the existing cables (up to 64) and then feed with 16 new 4 SU cables to the F:SNMUXA. If a F:SNMAT is necessary, no retrofit with the former SSG frames is possible because this frames are housed in a "modifizierte EWSD-Bauweise" rack with a fanbox and a fantray. If the F:SNCARE is present (for retrofit with connection of old LTGs with singles cables to the SN), all interconnecting cables between the F:SNCARE and the F:SNMUX (A) are pre-prepared. Moreover in case of extensions of F:SNMUX(A) (first 63 LTGs) and F:SNCARE (second 63 LTGn) the newly joining LTGs are general connected to F:SNCARE.
28
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
TSG 0-0
TSG 0-1
TSG 0-2
TSG 0-3
TSG 0-4
TSG 0-5
TSG 0-6
TSG 0-7 SSG 0-0/1 SSG 0-2/3
TSG 1-0
TSG 1-1
TSG 1-2
TSG 1-3
TSG 1-4
TSG 1-5
TSG 1-6
TSG 1-7 SSG 1-0/1 SSG 1-2/3
Fig. 16 SNB 504 LTGs: 20 frames
F:SNMUXA F:SNCARE F:SNMUXA F:SNCARE F:SNMUXA F:SNCARE F:SNMUXA F:SNCARE
FAN-TRAY
F:SNMUXA F:SNCARE F:SNMUXA F:SNCARE F:SNMUXA F:SNCARE F:SNMUXA F:SNCARE
F:SNMAT 0 F:SNMAT 1
FAN-BOX
Fig. 17 SND retrofit
SN1127EU13SN_0001
29
Siemens
2.1.1
Switching Network D (SND)
Frame SNMUXA
This chapter describes the module frame F:SNMUX (A) for the switching network SND. To be facilitated to the extension of existing nodes with SNB a more dense setup is required. This means the required modules must make more connections possible. To the module M:LILD now 16 LTG are connected. The first LTG connection of the LILD 0 and the LILD 4 (L63) lead to the message buffer. The modules M: LILD are connected with the module M:MUXC which contains a switching unit 16/16. To a module M:MUXC eight modules M:LILD are connected. To the frame F:SNMUX (A) now max. 126 LTGs are connected. With the F:SNMUX(A) it is possible to expand an existing node by replacing the F:TSG(B) by a F:SNMUX(A) with usage of the existing cabling. In a SND multiplexer rack SND multiplexers are redundantly operated from at least two F:SNMUX (A) and two F:LTG. The rack is a shielded rack in EWSD style (SIPAC construction) with central filter in the rack head. The frame F:SNMUX (A) supports 8 modules of M:LILD, 1 module of M:MUXC and 2 backplane modules of M:OML920. With that a concentration of 126 LTG connections on the post-connected switching unit arises in the full expansion. A granularity of 16 LTG/M:LILD and 126 LTG/F:SNMUX (A) can obtained, by partial equipping with M:LILD modules. F:SNMUX (A) already knows a small switching network created with a minimal configuration of 16 LTG/M:LILD. A partial equipped frame F:SNMUX(A) (63 LTG/F:SNMUX(A)) equipped with 4 M:LILD (= connection of 63 LTGs) and 1 M:MUXC replaces a F:SNB of this expansion. The distribution of the modules LILD 0 to LILD 3 in this module frame is carried out in a way, that for an extension of an existing node the already available wiring can be used. The frame F:SNMUX(A) gets central -48 V/-60V supply, the modules M:LILD and the modules M:MUXC generate itself the voltages needed internally with help of DC/DCfor transformers. The backplane modules OML920 are supplied with 5 V and 3.3 V from the DC transformers on the module M:MUXC.
30
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
1 2 C 3
LILD 3
LILD 7
LILD 2
LILD 6
OML 1
MUXC
OML 0
LILD 5
LILD 1
1
LILD 4
5
LILD 0
4
2 D 3 4 5
Fig. 18 F:SNMUX(A)
SN1127EU13SN_0001
31
Siemens
Switching Network D (SND)
The LILD multiplexes 16 x 8Mbit/s SDC from LTGs and MB to one 184 Mbit/s high speed highway. The ASIC A:MUX16 performs the preparation of incoming/outgoing data from/to the existing environment (LTGs) to the new frame format of the SND. In general there is a equalization memory unit (EMU) for each LTG to align the data, add 2 parity bits and inserts additional 256 time slots (overhead) for supervision purposes (see later chapter) in order to multiplex it to an 184.32 Mbit/s signal. For the outgoing branch a phase alignment, synchronization, parity check, overhead evaluation and distribution (demux) to 16 LTG links is done. For control purposes a HDLC interface to M:MUXC is also provided. From the 8 LILDs, 8 x 184 Mbit/s lead to the MUXC module and in addition 8 x 184 Mbit/s highways are coming from the optical links. This 16 high speed highways are led to an equalization memory (EMU) The main function is the equalization and alignment of 32 (in MUXC only 16 are used) inputs to a central clock system with a central frame mark bit. This is done by 32 (16) speech buffers written with individual incoming frequencies and read by a common central frequency. If all PLLs in the system EWSD are locked, the write pointers and read pointers of these buffers have a small but constant offset which allows the PLLs to adjust the frequency to the system clock without a frame slip or a big delay in the speech path. In free running mode of a PLL (this is already a fault) a frame slip or overlapping may occur but equally for all impacted time slots. After the equalization memory (EMU) the 16 high speed highways are led to a 16/16 switch. This cross point switch 16/16 is realized through 4 ASIC TSC32 (Time Stage Circuit). The ASIC TSC32 is that switching device in the SND. It contains 32 Time Stage Circuits and a space stage 32 # 4. Out of the 32 input lines of 184,32 Mbit/s only 16 are used in M:MUXC. In the Time Stage the speech data is written into a Speech Memory continuously in succeeding order and read according the control data in modified order. The control information is stored in additional 4 memories (one for each output). In the space stage (4 multiplexer 32 # 1 each controlled by a dedicated control memory) at a particular time one time slot of the 32 is switched onto the output. In the 32 memories there is more information stored than can be read by 4 outputs. That is the most important fact for nonblocking in a switch. All speech information is spread onto all inputs so that each output can pick up that time slot information determined by the output related control memory.
32
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
MBUL 0-0 LTG 0-1
...
1
MUX16
184 Mbit/s from 8 LILD 184 Mbit/s
LTG 0-15 LTG 0-16 LTG 0-31 LTG 0-32 LTG 0-47 LTG 0-48 LTG 0-63
LILD 0
... ... ...
4 4
1
...
LILD 1
O
0-7
LILD 2
8-11
12-15
E
EMU 32
LILD 3
OML 920
920 Mbit/s optical link
16 * 184 Mbit/s
MBUL 1-0 LTG 1-1 LTG 1-15 LTG 1-16 LTG 1-31 LTG 1-32 LTG 1-47 LTG 1-48 LTG 1-63
... ... ... ...
32/4 TSC32
LILD 4
0-7 LILD 5 LILD 6 LILD 7
1
...
184 Mbit/s to 8 LILD 1
O
switch 16/16 8-11
E
12-15
OML 920
920 Mbit/s optical link
4 4 184 Mbit/s
uP
GCG MUXC
V24 2x S1 S3
MBD
Fig. 19 Configuration F:SNMUXA-0
Two cables lead to the message buffer; one cable with four HDLC-links (8Mbit/s) with RX/TX, out of those two HDLC-links MBU:LTG and two HDLC-links MBD (S1 interface) and one-cable with one HDLC-link (8Mbit/s) MBD (S3 interface). For larger nodes with more than 252 LTG (126 LTG / F:SNMUX(A)) the F:SNMUX(A) is used in full expansion (8 M:LILD, 1 M:MUXC and 2 M:OML920). The F:SNMUX (A) is connected over glass fiber with 920 Mbit/s with the SNMAT (the switching unit). In nodes with max. 252 LTG (two F:SNMUX (A)), the two F:SNMUX (A) are directly connected with each other over glass fiber with 920 Mbit/s and no F:SNMAT is required. If an existing node shall be expanded (retrofit), the already available wiring can be used and the cables for modules LILD 4 till LILD 7 can be added as 4 SU cables.
SN1127EU13SN_0001
33
34
DP4
DP3
DP2
DP1
CP5
CP4
CP3
CP2
CP1
3 4 9
3 4 1
L63
L61
L59
L57
L54
L52
L50
L48
L55
L53
L51
L49
3 3 3 3 2 2 1 1 5 1 9 3
LILD-3
L62
L60
L58
L56
3 3 1
LILD-7
L127
L119
L126
L118
L125
L117
L124
L116
L123
L115
L122
L114
L121
L113
L120
L112
3 0 1
L47
L45
L43
L41
L38
L36
L34
L32 L33
L39
L37
L96
L111
L103
L110
L102
L109
L101
L108
L100
L107
L99
L106
L98
L105
L97
L104
2 5 3
2 LILD-6 6 1
2 2 6 6 5 1
L35
2 7 1
Backplane view
LILD-2
L46
L44
L42
L40
22 2 88 7 31 7
2 3 7
OML 1
OML 1
2 4 1
MUXC
2 1 3
OML 0
OML 0
2 2 2 2 5 1
LILD-5
L95
L87
L94
L86
L93
L85
L92
L84
L91
L83
L90
L82
L89
L81
L88
L80
1 9 1
1 8 1
1 8 1
L31
L29
L27
L25
L22
L20
L18
1 5 5
L23
L21
L19
L17
1 6 1
L16
1 6 7
LILD-1
L30
L28
L26
L24
1 7 3
LILD-4
L79
L71
L78
L70
L77
L69
L76
L68
L75
L67
L74
L66
L73
L65
L72
L64
11 44 31
L15
L13
L11
L6
L4
L2
LILD-0
L14
L12
L10
L9
L0
1 1 1 2 2 1 5 1 9
L8
L: Cabel of LTGs, directly plugged in MB TSG: Cabel to MBD-S1 MB SSG:Cabel to MBD-S3 ML=MBUL:Cabel to MBD-LTG
SSG
MB
TSG1
MB
L64
ML
TSG0
MB
L0
ML
2 1 0 9 1 9
1 1 3
L7
L5
L3
L1
1 0 7
1 0 1
Siemens
Switching Network D (SND)
Fig. 20 Mixed old and new cabling with 1SU and 4SU cable plugs (F:SNMUX(A))
SN1127EU13SN_0001
SN1127EU13SN_0001 LILD-7
LILD-2
L47 L39
L46 L38
Backplane view
L127L119
L63 L55
DP3
LILD-3
L126L118
L62 L54
DP2
L45 L37
L44 L36
2 4 7
2 LILD-6 6 1
L111L103
L110L102
L109L101
L108L100
L107 L99
L106 L98
L105 L97
L104 L96
2 5 3 2 3 7
OML 1
OML 1
2 4 1
MUXC
2 1 3
OML 0
OML 0
2 2 1
L88 L80
1 9 1
L90 L82
1 8 1
1 8 1 1 6 1
L25 L17
L24 L16
1 6 7
L30 L22
L29 L21
L28 L20
L27 L19
L26 L18
LILD-1
L31 L23
1 9 9 1 8 5
L14 L6
L78 L70
LILD-0
L13 L5
L77 L69
LILD-4
L12 L4
L76 L68
L15 L7
L11 L3
L75 L67
L79 L71
L10 L2
L9 L1
L73 L65
L74 L66
L8 L0
1 2 1
L72 L64
1 1 1 4 4 3 3 1 7
L: Cabel from LTGs, directly plugged in MB TSG: Cabel to MBD-S1 MB SSG:Cabel to MBD-S3 ML=MBUL:Cabel to MBD-LTG
LILD-5
L95 L87
L94 L86
L93 L85
SSG L92 L84
MB
TSG1 L91 L83
MB
L64
ML
TSG0 L89 L81
MB
L0
ML
2 0 1
2 5 5
DP4
L125L117
L61 L53
DP1
L124L116
L60 L52
L43 L35
L123L115
L59 L51
2 6 1
2 7 7
CP5
L42 L34
L122L114
L58 L50
CP4
2 7 1
L40 L32
2 8 1
L41 L33
CP3
2 9 5
L120L112
3 0 1
L121L113
L57 L49
CP2
3 3 2 2 5 1
L56 L48
3 4 1
3 1 9
CP1
3 4 9 1 1 3 1 0 1
Switching Network D (SND) Siemens
Fig. 21 Total new cabling with 4SU cable plugs (F:SNMUX(A))
35
Siemens
Switching Network D (SND)
2.1.2
Frame SNCARE
The module frame F:SNCARE comes to use at the extension of existing nodes, where a F:SNB is replaced by one F:SNMUX (A). Since the capacity of the F:SNMUX (A) allows double of the LTG connections of the SNB, the wires already existing must get spatial distributed. To do this the cables are put to the corresponding places of the F:SNCARE, the data lines are combined and led to a further cable plug plug-in place. The connection to the F:SNMUX is then made 4 SU/8 LTG-cables. It has to be taken into account, that at F:SNMUX (A) the connection MBUL 0 (LTG0) and MBUL 1 (LTG64) is not available for the connection of LTGs since these connections lead to the message buffer. It is therefore used short pins (pin type B) in the backplane at these plug-in places, LTG0 and LTG64, so that no connection to the wires of the interconnecting cable is carried out. All other pins are of the pin type E. 16 cable plug-in places are existing on the backplane of the F:SNCARE (for 1 SU/1 LTG or 2 SU/1 LTG cable). To this the existing cables are put and 4 plug-in places are used for the cables to the F:SNMUX (4 x4SU/8 LTG wires).
3 4 9
CP2 CP3 CP4 CP5 DP1 DP2 DP3
3 3 1
3 33 2 21 5 19
L56 L56
L48 L48 L56
3 3 4 3 1 7
3 1 3
2 8 9
3 0 1
22 2 88 7 31 7
L40 L40
L49 L57 L49 L49 L57 L50 L58 L58 L58 L50 L51 L59 L59 L51 L51 L52 L60 L60 L60 L52 L53 L61 L61 L53 L53 L54 L62 L62 L62 L54 L55 L63 L63 L55 L55
2 7 1
2 2 6 6 5 1
L32 L32 L40
L33 L41 L33 L33 L41 L34 L34 L42 L42 L42 L35 L43 L43 L35 L35 L36 L44 L44 L44 L36 L37 L45 L45 L37 L37 L38 L46 L46 L46 L38 L39 L47 L47 L39 L39
2 5 3
2 4 1
2 2 1
2 0 1
1 9 3
11 87 19
1 7 3
L24 L24
1 6 7
1 6 1
1 5 5
L16 L16 L24
L17 L17 L17 L25 L25 L18 L18 L26 L26 L26 L27
L19 L19 L19 L27
L20 L20 L28 L28 L28 L21 L29 L29 L21 L21 L22 L30 L30 L30 L22 L31
L23 L31
L23 L23
1 4 7
1 4 1
1 11 2 21 5 19
1 3 1 L8 L8
L9
L0 L8
1 1 3
1 0 7
1 0 1
L0
L1 L1 L9
L2 L2 L10 L10 L10 L11
L12 L12
L3 L11 L4 L12
L3
L3
L4
L5 L13 L13 L5
L5
L6 L14 L14 L14 L6 L15
L7 L15
L7
L7
DP4
Fig. 22 F:SNCARE (backplane view)
36
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
2.1.3
Frame SNMAT
The new switching unit structure and the switching unit module M: MATM produce the new frame F:SNMAT. The F:SNMAT is put duplicated in the rack (ÖN style or modified EWSD style) and supports the optical links to F:SNMUX and with this the connections to the LTGs. Besides this F:SNMAT also supports a 8 Mbit/s HDLC interface to the MBD over the F:MATC. A module M:MATM corresponds to a matrix 128/16 with up to 252 connectable LTGs. The full equipping of a F SNMAT with 8 M:MATM guarantees a matrix 128/128 with up to 2016 connectable LTGs. Every matrix module couples 128 input signals on 16 outputs. 4 multiplexer link modules M:OML920 are fixed assigned to every matrix module with respectively 4 date inputs each. These 4 OMLs conduct the 16 electrical 184 Mbit/s data streams in the form four optical 920 Mbit/s data streams to the backplane modules OMLs of the F:SNMUX. In the opposite direction from the SNMUX to M:MATM, the serial data streams are converted by the M:OML920 into 4 parallel 184 Mbit/s data streams. Each of these 4 signals is then split into 8 output signals and supplied to each of the 8 M:MATM. The non-blocking matrix structure given by this, is controlled, supervised and provided with clock in the F:SNMAT by the M:MATC. Over the M:MATC the switching unit redundantly operated in the rack, is connected by electrical cable links (8 Mbit/s data, 8 MHz clock and 2 kHz FMB) with the message buffer D.
optical link 920 Mbit/s
optical link 920 Mbit/s optical link 920 Mbit/s
optical link 920 Mbit/s
to/from F:SNMUX
M:MATM - 0
OML920-0 0 OML920-0 1 OML920-0 2 OML920-0 3
........... OML920 - 1/6 0/3 ...........
optical link 920 Mbit/s
optical link 920 Mbit/s optical link 920 Mbit/s
optical link 920 Mbit/s
M:MATC
to/from MBD
........... M:MATM - 1...6 ........... M:MATM - 7
OML920-7 0 OML920-7 1 OML920-7 2 OML920-7 3
electrical link 184 Mbit/s
2 Mbit/s HDLC
8 Mbit/s HDLC
Fig. 23 Configuration of F:SNMAT
SN1127EU13SN_0001
37
Siemens
Switching Network D (SND)
The following figure shows the basic flow of the speech information in an F:SNMAT and the allocation of the main functions over the modules. In F:SNMAT the switching matrix is made of 8 modules for enlargement in linear equal steps. Each module contains a switch 128 inputs to 16 outputs. 8 modules combined forms a switch with 128 inputs to 128 outputs (128 # 128, that sign # means a matrix) where each input is connected onto each module which is an important realization detail of the matrix. 8 modules with 16 outputs each are the required 128 outputs (due to the fact that outputs cannot be connected together). Each input or output contains 2304 time slots (8 bit + 2 parity bits, 184.32 Mbit/s). In each crossing point of the matrix there is a Time Stage Circuit realized for 32 inputs by the ASIC A:TSC32 which contains a space stage 32 # 4 as well. As shown in the following figure the matrix 128 # 4 is build up in two levels (level 1: 4x 32 # 4 = 128#16) and (level 2: 16 # 4). 4 of such arrays are a matrix 128#16. In level 2 the RAMs inside the A:TSC32 are not used for a time stage but for the TSSI function in case of a multi channel connection. The ASICs A:EMU32 have no switching functionality but they are necessary to align all incoming signals from op to 16 F:SNMUXA with different locations and cable length between 0 and 200 meters. The controller M:MATC performs the preprocessing for the path setup commands received from CP via the MBD-interface S3 and distributes the information to the
38
SN1127EU13SN_0001
SN1127EU13SN_0001
4
310
310 310
31
1
0
31
DC/DC
V24
V24
mP
OML 3 OML 1 OML 2
TSC 32
0 15
31
0
31
HDLC
MATM 0
31
28-31
EMU32
0
......
EMU32
0
TSC TSC TSC TSC 32 32 32 32
0
31 0
31
0
0
....
EMU32
28-31
0...3
OML 920
EMU32
0-3 4-7
....
0...3
OML 920
0
....
V24
V24
GCG
MATC MBD
S3
HDLC
uP
MEM
MATM 6
..... 28-31
0
31
0
31
31 0
310
310
DC/DC
V24
V24
mP
OML 30 OML 28OML 29
TSC 32
0 15
31
0
28-31
0
31
EMU32
HDLC
MATM 7
31
0
31
0
0
31
EMU32
EMU32
EMU32
TSC TSC TSC TSC 32 32 32 32
0
0-3 4-7
4
....
31
OML 920
electrical links with 184 Mbit/s ....
4
(OML 8) . . . . . . . . . . . . . .(OML 30)
optical links with 920 Mbit/s
MATM 1.
OML 920
7
Switching Network D (SND) Siemens
controllers on the modules M:MATM. The central clock generator, PLL and 5 V power supply for the entire frame are located also on M:MATM.
On the rear side of the frame up to 32 M:OML920 can be connected. This is a bidirectional transparent optical transmission link to/from the F:SNMUXA. Each of them contains 4 x 184.32 Mbit/s.
Fig. 24 Configuration of F:SNMAT
39
Siemens
Switching Network D (SND)
Construction: l
8x M:MATM
l
1x M:MATC
l
32x OML920 on the rear side of the backplane
Forced air convection is required All cables are bi-directional links (except the power cables). l
Cables for LTG / CCNC 2 SU for 1 LTG reuse of existing cable type 1 SU for 1 LTG reuse of existing cable type 4 SU for 4 LTG new type: 0.25 mm diameter, max. 100 meter
l
Cable for MBU:LTG (especially for MBD) 4 SU for 4 Links 2x MBU:LTG 2x MBU:TSG
l
Cable for S3 interface 1 SU for 1 Link, data rate for 16 former SGCs can be transmitted (time multiplexing)
l
Cable for SNCARE 4 SU for 8 LTG links
40
l
Cable for V24 interface with SubminD-connectors
l
Fiber optic cable removable on both ends (OML920)
l
2 power cables for F:SNMAT (connection of fuse panel <=> F:SNMAT)
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
1 2 C
3
MATM 0
MATM 1
MATM 2
MATM 3
MATC
MATM 4
1
MATM 5
MATM 7
5
MATM 6
4
2 D
3 4 5
Fig. 25 F:SNMAT
Ba c kp la n e vie w M A TM 7
M A TM 6
PWRB
SU 1
C 1
SU 2
C 2
SU 3
C 3
SU 4
C 4
PWRB
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
M A TC
M A TM 3
PWRA
PWRA
PWR A
MA TM 2
OML 920
OML 920
PWRA A
OML 920
OML 920
M A TM 0
M A TM 1
PWRA
OML 920
PWRA
OML 920
OML 920
OML 920
C 1
C 2 X239C1
C 3
C 4
OML42 (OMLINV) X257D2
X227C1 OML31
OML33 (OMLINV) X239D2 X227D2
X205C1 X193C1 OML30 OML21
OML32 OML23 (OMLINV)(OMLINV) X205D2 X193D2
X171C1 X159C1 OML20 OML11
OML22 OML13 (OMLINV) (OMLINV) X171D2 X159D2
X137C1 X125C1 OML10 OML01
OML12 OML03 (OMLINV) (OMLINV)
X113C1
OML52 OML43 (OMLINV)(OMLINV) X291D2 X279D2
X257C1 OML40
X147C1
OML62 OML53 (OMLINV)(OMLINV) X325D2 X313D2
X291C1 X279C1 OML50 OML41
X181C1
OML72 OML63 (OMLINV) (OMLINV) X359D2 X347D2
X325C1 X313C1 OML60 OML51
X215C1
OML73 (OMLINV) X381D2
X359C1 X347C1 OML70 OML61
X239C1
X381C1 OML71
X267C1
D 1
M A TM 4
PWRB
X301C1
SU 6
OML 920
X335C1
C 5
PWRB
OML 920
X369C1
SU 5
M A TM 5
X137D2 X125D2
X103C1 OML00
C 5
OML02 (OMLINV) D 1 X103D2
SU 7
D 2
SU 8
D 3
MBC
D 3
SU 9
D 4
PWR B
D 4
S U 1 0
D 5
D 2
OML 920
OML 920
OML 920
OM L 920
OML 920
OML 920
OML 920
OM L 920
OML 920
OM L 920
OM L 920
OM L 920
OML 920
OML 920
OML 920
OML 920
A
A
101
111
121
131
141
85
151
161
171
181
85
191
201
211
60
221
231
70
241
251
261
85
271
281
291
301
85
311
321
85
331
341
351
361
371
381
385
45
D 5
85
Fig. 26 F:SNMAT (backplane view)
SN1127EU13SN_0001
41
Siemens
2.2
Switching Network D (SND)
Module MATC
The main tasks of the module M:MATC are: l
Synchronization of F:SNMAT with system clock from MBD
l
Processing of commands/messages from/to MBD over 1 HDLC-link with 8,192 MHz
l
Supervision of reference clock from MBD
l
Supervision of all HDLC-links
l
Control of the 8 M:MATM over HDLC-links with 2,048 Mbit/s
l
Support of test interfaces (JTAG/Boundary Scan, V.24, Tracer)
l
Power supply of module and of 32 connected M:OML920.
System HF-clocks (92MHz) to 8 MATM modules
Clock Generator (PLL) 2 MBit/s HDLC to/from MATM0
HDLC1
2 MBit/s HDLC to/from MATM1
HDLC2
2 MBit/s HDLC to/from MATM2
HDLC3
2 MBit/s HDLC to/from MATM3
HDLC4
System FMB92 (8kHz) to 8 MATM modules clock only
diff I/O
from/to MBD 8 MBit/s HDLC 16 channels at 128 kBit/
HDLC CONTROLLER HDLC
V.24
V.24
CPU 2 MBit/s HDLC to/from MATM4
HDLC1
2 MBit/s HDLC to/from MATM5
HDLC2
2 MBit/s HDLC to/from MATM6
HDLC3
2 MBit/s HDLC to/from MATM7
HDLC4
MATM plugged I/O
BOST HDLC CONTROLLER
FEPROM
RAM BDM
Power Supply DC/DC 3V3, 18 W
M:MATC
LEDs
Power Supply DC/DC 5V, 60 W
-48/-60V 5V Supply for OML920 JTAG
Fig. 27 Block diagram M:MATC
42
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
2.3
Module MATM
The main tasks of the module M:MATM are: l
Phase/Word-Alignment of incoming 184,32 Mbit/s-highway-data
l
Equalization Memory Unit for speech data to equalize clock and cable length differences
l
Switching over a switching matrix with 128 inputs (each 184,32 Mbit/s / 2304 time slots) to 16 outputs (each 184,32 Mbit/s / 2304 time slots)
l
TSSI (Time Slot Sequence Integrity) function
l
BSI ( Bit Sequence Integrity) function
l
Speech path monitoring during operation
l
Processing of commands/messages from/to M:MATC over a HDLC link with 2,048 Mbit/s
l
3,3V-supply, control and monitoring of 4 x M:OML920
l
Control of ASICs (4 x A:EMU32, 20 x A:TSC32)
l
Passive clock distribution (92 MHz and 8 kHz) to the ASICs
l
Support of several test interfaces (V24, Tracer, JTAG, BDM) from 32 OML920s 128 x data (184 Mbit/s, differential) without clock
A:EMU 32 Phase Aligner
A:TSC32 A:TSC32 A:TSC32 A:TSC32 32#4 32#4 32#4 32#4
to 4x OML920 4x4 data (184 Mbit/s, differential with 4x clock)
A:TSC32 16#4 TSSI
4x HDLC bus
Clock buffer
EEPROM HDLC HDLC HDLC HDLC
RAM
3,3V
Board Controller V24
1,2V
I/O
HDLC-Slave Boundary Scan JTAG
from M:MATC CLK92 FMB8 differential
DC/DC Converter 3.3V
OML920 Control and supply
-48/-60V
HDLC BDM
to M:MATC M:MATM plugged
V24 BOST board address interface
to/from M:MATC 2 Mbit/s HDLC
Fig. 28 Block diagram of M:MATM
SN1127EU13SN_0001
43
Siemens
2.4
Switching Network D (SND)
Module MUXC
The main tasks of the module M:MUXC are: l
Phase/Word-Alignment of incoming 184,32 Mbit highway data
l
Equalization Memory Unit for speech data to equalize clock and cable length differences
l
The M:MUXC receives/transmits the 184,32 Mbit/s highway data to/from the M:LDID depending on the system configuration: to/from the M:LILD in a system configuration of < 126 LTGs to/from a second F:SNMUX(A) via M:OML920 in a system configuration of > 126 LTGs and <252 LTGs to/from a F:SNMAT via M:OML920 in a system configuration of > 252 LTGs
l
Synchronization of F:SNMUX(A) to system clock from MBD
l
Processing of commands/messages from/to MBD over 3 HDLC links with 8,192 MHz
l
Speech path monitoring during operation
l
Supervision of reference clock from MBD
l
Control of 8 M:LILD over HDLC link with 2,048 MHz
l
Monitoring of all HDLC links
l
Control of 2 backplane modules M:OML920
l
Control of ASICs (EMU32, 4 x TSC32)
l
Support of several test interfaces
l
Power supply of module and of 2 connected M:OML920.
l
Interfaces to the Message buffer There are three HDLC connections (RX/TX) with the message buffer. 2 HDLC links MBD-S1 correspond to the TSG interface with regard to the electrical qualities at SNB and serve for the reception and for sending of commands to/from the CP. 1 HDLC link MBD-S3 corresponds to the SSG interface with regard to the electrical qualities at SNB and serves for the reception and for sending of commands of this/to the CP.
l
Interfaces to the modules M: LILD Eight 2 Mbit/s HDLC connections lead directly to the modules M:LILD. The control of the modules M:LILD are carried out via those connections. In direction to the M:LILD clock and data are transmitted, in direction from the M:LILD only data. Eight 184 Mbit/s connections (RX/TX) are leading to and from M:LILD.
44
SN1127EU13SN_0001
Switching Network D (SND)
Siemens
The module M:MUXC delivers eight 92 MHz system clocks CLK92 and eight 8 kHz/50:50 (synchronous with 92 MHz time) FMB92 clocks. Those clocks serve the 184 Mbit/s connections with synchronization. The module M:MUXC delivers eight 8 MHz system clocks CLK8 and eight 2 kHz/50:50 FMB2 clocks. Those clocks serve the 8 Mbit/s SDC interfaces for the LTGn with synchronization. A signal LILD_PRESENTx (x = 0 to 7) is led to M:MUXC of every M:LILD. A signal LILD_RESETx (x = 0 to 7) is led from M:MUXC of every M:LILD. l
Interfaces to the backplane modules M: OML920 From and to two M:OML920 lead four 184 Mbit/s connections each ( 4 times data from the M:OML920 and to 4 times data and one time clock to the M:OML920). Four control lines to each OML support the signals OML_PRESENT (backplane module plugged in), OML_OLOOP (loops the receiving data to the transmit data), OML_FINS (fault insertion) and OML_SWITCH (switch signal). The M:MUXC provides the power supply with VCC3V (3.3 V) and VCC5V (5 V) for the two M:OML920.
l
Further interfaces: The JTAG interface ends at the plug of the backplane. The power supply is carried out centrally with-48V/-60V. Remote Inventory. 6 lines are needed for an I2C interface. A BoST interface with the three signals BOST_RESET, BOST_MODE and BOST_RESULT ends on pins of the backplane. V24 interface. This interface is led to a plug at the front panel of the module. A test adapter interface. This interface is led only to a plug at the front panel of the module.
SN1127EU13SN_0001
45
Siemens
46
Switching Network D (SND)
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
A:EMU32 differential line receiver phase/word alignment parity check/generation serial/parallel-conversion equalization memory maintenance channel check/generation insertion RAM-ID in maint. ch. parallel/serial-conversion 16 x 184 Mbit/s data, differential line transmitter 2 x 184 MHz clock
LILD 1 2 from LILD 184 Mbit/s data, differential 8
...
LILD 1 2
to LILD 184 Mbit/s data, differential
1 •from OML •184 Mbit/s data •differential 8
4x A:TSC32
1 •to OML •184 Mbit/s data (8) and 184 MHz •clock (2), diff. 8
differantial line driver serial/parallel -conversion maintenance check/generation RAM-ID check cross point switch 16/16 parallel/serial-conversion differential line transmitter
8
2 Mbit/s HDLC
to/from LILD 2 Mbit/s HDLC
V24 OML-Control BOST Boundary scan
1 Board Controller
8
LILD-Control Board-ID
Power Supervisory differential line receiver/ transmitter
to/from MB-D 3x8 Mbit/s HDLC, 2x (1*128 kbit/s, diff.) 1x (2*128 kbit/s, diff.)
Clock Generator (PLL)
+3,3V
DC/DC Converter
-48/-60V
M:MUXC 1 8 +5V +1,2V to LILD +3,3V 92 MHz clock, diff. 8 kHz FMB, differential to OML 8.192 MHz clock, 2 kHz FMB
Fig. 29 Block diagram of M:MUXC
SN1127EU13SN_0001
47
Siemens
2.5
Switching Network D (SND)
Module LILD
The main tasks of the module M:LILD are: l
8 Mbit/s interfaces for 16 LTGs, consisting our of data, clock and frame mark bit for each direction.
l
Clock adaptation of LTG input to M:LILD internal clock with EMU
l
Monitoring of LTG Interface (frame mark bit and clock)
l
Multiplexing of the 16 LTG 8 Mbit/s inputs to a high speed link with 184 Mbit/s
l
Insertion of parity bits (2 per 8 bit) and overhead bytes (256 bytes per 184 Mbit/s high speed link).
l
De-multiplexing of the 184 Mbit/s high speed link input to 16 LTG outputs of 8 Mbit/s with the help of a FIFO function)
l
Overhead- and parity bit evaluation of the 184 Mbit/s high speed link input
l
Loop insertion in data paths for test and maintenance purposes
l
Boundary scan interface for factory test.
l
HW pre-arrangement for remote inventory and improved maintenance
l
Interfaces to the LTGn These 16 interfaces carry a 8 Mbit/s signal with 8 Mbit/s data, 8 MHz clock and a 2 kHz/122 ns FMB2 frame mark bit (synchronous with 8 MHz clock) for every LTG in sending and reception direction. Note: The connection of the LTG0 (LILD 0) and the connection of the LTG64 (LILD 4) is used as connection to the message buffer.
l
Interfaces to the M: MUXC: A 2 Mbit/s HDLC connection leads directly to M:MUXC: Data run over it in sending and reception direction and a 2 MHz clock, which is delivered by M:MUXC. A 184 Mbit/s connection carries the data in sending and reception direction. The 184 MHz clock create the modules M:LILD and M:MUXC internal from the 92 MHz system clock. There is no 184MHz clock line between the modules. The 92 MHz system clock and the 8 kHz FMB92 clock are delivered by M:MUXC and serve for the synchronization to the 184 Mbit/s connections. The 8 MHz system clock and the 2 kHz FMB2 clock are delivered by M:MUXC and serve for the synchronization of the 8 Mbit/s HDLC connections. A signal PRESENT is led to M:MUXC from every M:LILD and reports, that M:LILD is plugged in. Each M:LILD gets a signal RESET_L of the M MUXC. This allows a selective reset of every M:LILD.
48
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
l
Further interfaces A JTAG interface of the ASIC MUX16 ends at the plug of the backplane. The power supply is carried out centrally with-48 V/-60V. Three pins module address (MOD_ID0, MOD_ID1 and MOD_ID2). They are fixed coded for every M:LILD on the backplane.
MBUL LTG 1
differential LTG line receiver and line termination
8 bit/ 10 bit conversion (parity generation) 16 EMUs overhead insertion multiplexing of 16 LTGs to 184 Mbit/s LTG-loops
differential LTG line transmiter and line termination
phase alignment word alignment synchronisation and FMB 10 bit/ 8 bit conversion (parity check) Overhead buffer Overhead evaluation demultiplexing of 184 Mbit/s to 16 LTGs HS data link loop
LTG15 MBUL LTG1
LTG15 DCC 48V/60V 3.3 V
HDLC interface control functions
to MUXC 184,32 Mbit/s diff.
MUX16
Power on reset
Address pins
from MUXC 184,32 Mbit/s diff.
LILD Plugged pin
serial HDLC interface to/from MUXC
Fig. 30 Block diagram of M:LILD
SN1127EU13SN_0001
49
Siemens
Switching Network D (SND)
Frame structure and synchronization for the 184 Mbit/s SND data signal The LTG data are transmitted on a 184 Mbit/s Highway between M:MUXC and M:LILD. The 184 Mbit/s highway contains 16 x 128 user channels and 256 test channels altogether 2304 channels. Each channel consists out of 10 bits. The two extra parity bits (odd and even parity) are inserted in the 8 bit user data to monitor data integrity. These channels are combined in 18 virtual blocks to each 128 channels. The 256 test channels are located as follows. Each of the 18 blocks contains 14 test channels at fixed addresses. The remaining 4 test channels are located in block no. 0 and 9 at the relative address 17 and 18. In the next table the locations of all test channels are listed. Any other channel, not listed there, is a normal payload channel. In the following table the location of the test channels in the data stream is defined. A subset of the 256 test channels is available for synchronization, memory address supervision and memory identification tests used, i.e. 239 channels are free for other applications. The test channels used for synchronization and address supervision are represented one by one in the following table. Three programmable test channels are used for a further test feature between the ASIC EMU32 and TSC32 (default are channel H'11,H'12 and H'41).
50
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
block 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
0 syn0 asw5 asw6 tstch asw7 tstch tstch tstch asw8 tstch tstch tstch tstch tstch tstch tstch asw9 tstch
1 syn1 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
2 syn2 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
3 syn3 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
relative test channel addresses in each block 4 8 16 17 18 32 64 65 asw0 asw1 asw2 tstch tstch asw3 asw4 tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch tstch tstch tstch payld payld tstch tstch tstch
66 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
67 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
68 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
127 tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch tstch
syn = synchron word channel asw = addresses supervision word channel tstch = test channel payld = payload channel 3 x tstch are needed for a special test feature between EMU 32 and TCS 32 (RAM-ID)
Fig. 31 Frame structure of 184.32 mbit/s signal
syn0 syn1 syn2 syn3 asw0 asw1 asw2 asw3 asw4 asw5 asw6 asw7 asw8 asw9 Channel-address Channel content without parity bits
0
1
‘F6’ *) ‘F6’ *)
2
3
4
8
16
32
64
128
256
512
1024
2048
‘28’ *)
‘28’ *)
‘03’
‘04’
‘05’
‘06’
‘07’
‘08’
‘09’
‘0A’
‘0B’
‘0C’
Fig. 32 Values of syn- and asw-words of the 184 mbit/s-highways
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Parity even
Parity odd
data 7
data 6
data 5
data 4
data 3
data 2
data 1
data 0
Fig. 33 Data format at high speed output
SN1127EU13SN_0001
51
Siemens
2.6
Switching Network D (SND)
Module OML920
The optical multiplexer link module OML920 is a transparent transceiver backplane module. The necessary length of the data connection between SNMAT and SNMUX can be up to 200m. For the data connection at the needed data rate and distance, it is more economic to use an optical link then to use an electrical connection. Four electrical data streams with 184.32Mbit/s each are transmitted from one OML920 module to another OML920 module by an optical fiber. It provides a bidirectional data connection with a fiber length up to 200m. The laser diode has a wave length of 1300nm and a PIN diode converts the optical signal into an electrical signal. l
Transmitter part: The 4 electrical input data streams are sampled with the system clock, coded, multiplexed and than converted into a serial optical data stream with 920Mbit/s, which is output to an optical fiber.
l
Receiver part: The optical input data are converted into an electrical data stream, paralleled, decoded and sent to the electric data output ports. The 8 output ports (each with 4 serial 184Mbit/s data streams) provide all the same data. For the application in the SNMUX, all output ports except port 0 are deactivated.
The module can be plugged to the backside of F:SNMUX, F:SNMAT in its standard position and in the upside down position. The module is plugged to the backplane with row 112 at the top (normal position). In the SNMAT frame there are OML920 modules in an upper row and in a lower row. In the upper row the modules are plugged in normal position, in the lower row they are plugged in the opposite position which means that module is plugged with the row 112 to the lower side. The dimensions of the module are 94 x100 mm x19 mm and it can be plugged and pulled during operation. In case of interface faults for example OML faults it is difficult to detect the end of the interface that is defect (OML on SNMUX or OML on MATM/SNMUX). To simplify to procedure of OML repair all OML faults (near and far end) will be assigned as faults of the connected SNMUX. Moreover diagnostics of the SNMUX will be able to verify the functionality of the OMLs on both ends.
52
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
SND (EWSD)
SNMAT
SNMUX OML920
OML920 port 0
E
0
0
E
OLX920
OLX920 E
0
0
E
port 0 . . . port 7
Connections: 920 Mbit/s optical
4x184 Mbit/s electrical
Fig. 34 Application of the OML920 module in the switching network SND with SNMAT
SND (EWSD)
SNMUX
SNMUX OML920
OML920 port 0
E
0
0
E
OLX920
OLX920 E
0
0
E
port 0
Connections: 4x184 Mbit/s electrical
920 Mbit/s optical
Fig. 35 Application of the OML920 module in the switching network SND without SNMAT
SN1127EU13SN_0001
53
Siemens
Switching Network D (SND)
The M:OML920 has a bi-directional optical interface (920 Mbit/s), which leads to F:SNMAT. It has 4 equal-type electrical interfaces with each data inputs (184 Mbit/s) and each 8 data outputs (184 Mbit/s) per receipt of which however only one leads to the M:MUXC. Sending clock is 184 MHz and is derived from the M:MUXC. l
Interfaces to the M: MUXC: There are 4 data inputs with data of the M:MUXC (184 Mbit/s). Out of the 32 data outputs (184 Mbit/s) respectively only one output is led to the M:MUXC. All other outputs are not used and over the control signal PDIS disabled The M: MUXC delivers sending clock of 184 MHz. The power supply for OML920 is carried out by the M:MUXC. These are VCC3V (3.3 V) and VCC5V (5 V). 4 Control lines are available to the control of the OML. These are the signals PLUG, FINS, OLOOP and OSW.
l
Further control line: The control line PDIS about the backplane SNMUX (A) is connected to GND and serves for the switching off of the not needed outputs, at the F:SNMUX(A) these are the outputs 1 to 7 for each of the 4 inputs.
l
Interfaces to the F: SNMAT: The optical interfaces drive signals with 920 Mbit/s.
54
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
OML920 Module OLX920 ASIC
TCLK920
Clock Generation
OCIP/OCIN
Laser Control
ODIO...3N
4B/5B Coder
4
4
P
5
E S
O
OPTO
O
OPTI
4
ODO0...3N1
4
ODO0...3P7/
4
Descrambler
4
ODO0...3P1/
Fault Insertion
ODO0...3N0 4
RCLK184
ODO0...3N7 PDIS
Synchronisation
FINS
5
P E
S RCLK920
ODO0...3P0/
4B/5B Decoder
ODIO...3P/
Scrambler
TCLK184
Clock Recovery
LOOP PLUG OSW
(not connected)
Fig. 36 Block diagram of M:OML920
SN1127EU13SN_0001
55
Siemens
Switching Network D (SND)
The signal is 4B/5B coded and multiplexed to a serial data stream. This coding is done to ensure a correct stream alignment on the receiver side and to enable AC coupling of the serial data stream. The coding is done according to the following table:
4 bit-word (TS0 TS1 TS2 TS3) 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111
5 bit-word (TC0 TC1 TC2 TC3 TC4) Normal operation 00101 10001 10010 10011 10100 10101 10110 00111 11000 01001 01010 01011 01100 01101 01110 11010
Fig. 37 Code table of the 4B/5B-coder
56
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
2.7
Clock Distribution Architecture
The clock distribution of SND has to meet following requirements: l
Distribution of EWSD system clock to all LTG’s of EWSD
l
Distribution of clock to all ASIC’s inside SND
l
Hold over function for PLL
l
Switching off the CLK8 in case of a PLL alarm (only valid on F:SNMUXA and APS>=V14)
The clock source of all SND clock frequencies is the Message Buffer (MB). The system clock consisting of 8.192 MHz and the Frame Mark Bit (FMB) is distributed via SDC-link from the Message Buffer MBD to all frames of SND. Inside the frames F:SNMAT and F:SNMUXA the clock is regenerated and distributed via the modules MATC and MUXC.
MBD
SNMUXA
8.192 MHz + FMB
SNMAT MUXC
MATC
MATM
LILD
LTG
LILD
LTG
.. ...
LILD
OML920
OML920
OML920
OML920
MATM
..
MATM
OML920 OML920
184 MHz
LTG
Fig. 38 Clock distribution of SND
SN1127EU13SN_0001
57
Siemens
Data FMB Clock
Switching Network D (SND)
S/P
Phase Alignment Synchronisation Word Alignment
EMU HSDO
LTG Data FMB Clock
S/P
EMU
OML920
EMU32 EMU
clock domain boarder CLK92
counter
PLL
PLL counter
FMB92
P/S clock domain boarder HS Data
HS Clock
Synchronisation Word Alignment
MUX16
TSC32 speech memory
PLL counter
clock domain boarder
FIFO
Phase Alignment Synchronisation Word Alignment
HSDI
HSDI
HSCI CLK92 FMB92 FMB2 CLK8
FMB2 CLK8
PLL MUXC
LILD0 LILD7 separate point to point clicktree to all LILDs and ASICs
OML920
from MBD
Fig. 39 Clock architecture of F:SNMUXA
58
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
HSDO
OML920
Phase Alignment Synchronisation Word Alignment
EMU32 FMB92 CLK92
EMU
PLL counter PS HS Data
HS Clock
synchronisation word alignment
TSC32 FMB92 CLK92
speech memory from other TSC32s
PLL counter
synchronisation word alignment
TSC32 FMB92
M:MATM7....
CLK92
speech memory
PLL counter
point to point clicktree to each module
M:MATM0
CLK92 FMB92
HSDI HSCI
PLL from MBD
M:MATC
Fig. 40 Clock architecture of F:SNMAT
SN1127EU13SN_0001
59
Siemens
2.8
Switching Network D (SND)
Interface MBD/SND
On the following figures the interfaces to the MBD are shown, depending on the different capacity stages of SND. There are 3 different Interfaces (S1...S3), but only the types S1 and S3 are relevant for SND. Commands and messages can be received by the modules of SND on various interfaces. However, the received commands lead to different reactions, depending on the capacity stages, the interface and the jobcode (JC2). All messages to the CP have always to be sent via that physical line and on the same time multiplex channel as the corresponding command had been received on. For spontaneous messages a data path has to be defined. The CP commands/messages to/from SND are transmitted with 128 kbit/s (2 time slots per frame). l
Extension range <= 126 LTG: Action on MUXC (LILD) Command interfaces: S1 (X.0, X.1): MUXC is used as switch S3 (CH0/1): MUXC is used as switch
l
Extension range <= 252 LTG: Action on MUXC (LILD) Command interfaces: S1 (X.0, X.1): MUXC is used as switch or as multiplexer S3 (CH0/1, CH2/3): MUXC is used as switch
60
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
used as switch
up to 126 LTG
MUXC 0
S1
S... type of interface 0. 0. 0. 0 1 2
0. 0. 0. 3 4 5
1. 1. 1. 0 1 2
1. 1. 1. 3 4 5
7. 7. 7. 0 1 2
7. 7. 7. 3 4 5 S3
MBDH 0
MBDH 1
...
MBDH 7
MBDCG
MBD
MBDC IOP:MB
Fig. 41 MBD-interface at SND:126LTG
used as multiplexer
used as switch
up to 126 LTG up to 126 LTG
MUXC 1
MUXC 0
S1
S... type of interface 0. 0. 0. 0 1 2
0. 0. 0. 3 4 5
1. 1. 1. 0 1 2
1. 1. 1. 3 4 5
7. 7. 7. 0 1 2
7. 7. 7. 3 4 5 S3
MBDH 0
MBDH 1
... MBDC
MBDH 7
MBDCG
MBD
IOP:MB
Fig. 42 MBD-interface at SND:252LTG
SN1127EU13SN_0001
61
Siemens
l
Switching Network D (SND)
Extension range <= 504 LTG: Action on MUXC (LILD) or on MATC (MATM) Command interfaces: S1 (X.0, X.1): MUXC is used as a multiplexer S3 (CH0/1, CH2/3, CH4/5, CH6/7): MATC (MATM) is used as switch
l
Extension range <= 2016 LTG: Action on MUXC (LILD) or on MATC (MATM) Command interfaces: S1 (X.0, X.1): MUXC is used as multiplexer S3 (CH0/1, CH2/3, CH4/5, CH6/7, ... CH30/31): MATC (MATM) is used as a switch
MATM
switch used as multiplexer
MATM
MUXC
up to 126 LTG up to 126 LTG up to 126 LTG up to 126 LTG
3
. . .
MUXC 2
MUXC 1
MATM
MUXC 0
S1
S... type of interface 0. 0. 0. 0 1 2
0. 0. 0. 3 4 5
MBDH
1. 1. 1. 0 1 2
0
7. 7. 7. 0 1 2
1. 1. 1. 3 4 5
MBDH
7. 7. 7. 3 4 5 S3
... 1
MBDC
MBDH
7
MBDCG
MATC
MBD
IOP:MB
Fig. 43 MBD-interface at SND:504LTG
62
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
switch
used as multiplexer up to 126 LTG
.
used as multiplexer
. .
up to 126 LTG
up to 126 LTG
MATM
15
MUXC MATM
14
MUXC 3
. . .
MUXC
up to 126 LTG up to 126 LTG
up to 126 LTG
MUXC
2
MUXC 1
MATM
MUXC 0
S1
S... type of interface 0. 0. 0. 0 1 2
0. 0. 0. 3 4 5
1. 1. 1. 0 1 2
MBDH 0
1. 1. 1. 3 4 5
MBDH 1
7. 7. 7. 0 1 2
... MBDC
7. 7. 7. 3 4 5
MBDH
S3
7
MBDCG
MATC
MBD
IOP:MB
Fig. 44 MBD-interface for SND:2016LTG
Interface Type S1 This interface corresponds to the MBUS interface “TSG“ of SNB. The format is changed. Interfaces of the type S1 are always connected to modules of type MUXC of SND. The interface S1 consists of 2 physical lines, which are characterized by X.0 and X.1. The X characterizes the number of the MBDH module (0...7) on the MBD. The digit 0 or 1 shows the number of the termination on the module used for connecting the line. The function of the terminations is the same as those of TSG (TSG0, TSG1) of the SNB. Interface Type S3 The interface S3 is a new one for the MBD. The information of max. 4 physical SSGlines of the SNB are integrated by time multiplex onto one physical line. Additional, the interface S3 contains 12 further channels, which are used for the extension from 504 LTGs up to 2016 LTGs (the extension can be used with CP (APS >= V14) only). Thus, depending on the extension of the SND, the interface S3 contains up to 16 "SSG"-information's. (For each logical connection there are used two time multiplex channels:. CH0/1, CH2/3, ... , CH30/31). With the extension range up to 504 LTGs only the channels CH0/1 ... CH6/7 are used. Depending on the extension range, the interface S3 either is connected to a MUXC (<= 252 LTG) or to a MATC (> 252 LTG).
SN1127EU13SN_0001
63
Siemens
time slots frame 4 x 128 time slots
Switching Network D (SND)
0
2
4
127
0
127
0
127
0
126 127
127
0
126 127
8 bit 4 x 125 ms frame 8/16 bit = 64/128 kbit/s
data 8,192 Mbit/s
CLK8 8,192 MHz
FMB2
The time slots 0/1 are used only
2 kHz
The MSB will be sent first There is no alignment of message bytes to the time slots marked by the FMB.
Fig. 45 Timing diagram S1
time slots frame 4 x 128 time slots
0
2
4
127
0
127
0
8 bit 4 x 125 ms frame 8/16 bit = 64/128 kbit/s
data 8,192 Mbit/s
CLK8 8,192 MHz
FMB2
The time slots 0/1 and 2/3 are used only
2 kHz
The MSB will be sent first There is no alignment of message bytes to the time slots marked by the FMB.
Fig. 46 Timing diagram S3
64
SN1127EU13SN_0001
Switching Network D (SND)
3
Siemens
Software Functions
SN1127EU13SN_0001
65
Siemens
3.1
Switching Network D (SND)
Test and Diagnostics
The SND provides extensive self-test capabilities during normal operation. This includes in particular the online supervision of speech channels, which allows to sacrifice the MML command group TEST SN/TSG/SSG needed for SNA and SNB. Those continuous tests are run autonomously by the SND hardware and firmware and do not underlay CP control. Error findings result in spontaneous fault messages. Test activities can also be invoked from CP side l
as an additional sanity check on occasion of other commands (e.g., CONF SN) sent from the CP to the SND
l
on occasion of MML commands initiated for the special purpose of diagnosing SN components (DIAG SN)
l
on occasion of audits
Activities not directly related to SND internal units are the measures to verify the SGC channels, like CYCLE commands and HDLC protocol supervision. Diagnostics initiated by MML command require that the diagnosed unit is brought to status MBL first. The SND firmware interface allows to diagnose l
the hardware of a single SND unit separately, independent from other units. This type of test (“all”) does not include speech paths.
l
speech paths extending over multiplexing equipment as well as switching equipment and including optical links. This type of test (“speech”) is defined for an entire plane, because all matrix equipment is not available for redundancy purpose when patterns are looped via OMLs.
It is at the discretion of the issuing MML command if the craft has to issue both types of test separately or if this can also be done in one command. For diagnosis of the SND the following MML-commands are necessary:
66
MML CMD
Duration
Diagnosis for
DIAG SN
10 min
the whole SND
DIAG MATC
1 sec
the MATC
DIAG SNMAT
8 min
the MATC and all MATMs
DIAG MATM
8 min
one MATM,
DIAG SNMUX:TA=LOOPT
5,3 msec
one SNMUX looptest
DIAG SNMUX:TA=HWC
2,5 min
one SNMUX HWC test
SN1127EU13SN_0001
Switching Network D (SND)
Siemens
The MML-commands DIAG MATC/SNMAT/MATM/SNMUX are new and allowed for SND only. They will be rejected in case of SNA/SNB. The MML-command DIAG SN exists already for the SNA/SNB. In case of SND the parameter SUBUNT (subunit) isn’t allowed and for the parameter TA (test area) only HWC or LOOPT (looptest, new) is allowed. The MML-commands TEST SN/TSG/SSG and DIAG TSG/SSG will be rejected in case of SND The TEST MML commands are not implemented for the SND, because the hardware for the SND has internal speech path supervision and the diagnostic MML commands can be used to detect any hardware errors in the SND.
3.2
Best Side Selection (BSS)
Single units of the switching network plane built up redundant pairs, working in a ACT / STB mode. Both units of the pair carries speech, but the LTG takes its speech only from the ACT unit. The new switching network SND does not have that „cross switching“ functionality in-between the two units of a redundant pair, as it is case in the switching network SNA or SNB. That means: the active single unit of a pair on one SND side plane cannot be taken over only by the redundant ( STB ) unit on the other SND plane. Always the ACT /STB states of all units of the entire SND ( all speech channels ) have to be changed. In case of an SND, e.g. the SNMUX-0-0 fails first, all LTGs-0-X to LTGs-3-X of the entire SND are switched over to the other SN side ( all speech paths ), because the ACT / STB states of all SNMUX and MATM has to be changed (see below ). Otherwise the LTGs-0-X and LTGs-1-X can not communicate with the LTGs-2-X and LTGs-3-X ( X = 1....max. 63 ). A second or higher fault in SNA or SNB leads only to a further switch-over of a single unit to its redundant unit of the pair on the other SNA / SNB plane, as it is the case in the first fault. If the second fault is not an outage of the redundant TSG or SSG pair, there is no loss of LTGs at all. On the other hand, a second fault in SND results in a loss of LTGs anywhere: either all LTGs of the first fault or LTGs of the second fault are lost. The only thing, which can done by configuration, is to minimize the loss of active LTGs. This is done by checking which one of the two SND planes is the better one and then switch-over to the better SND plane. That new functionality is called „Best Side Selection“ ( BSS). BSS is done by CP. For best side selection, first CP has to find out the different types of units, connected to SND and second to evaluate their loss. The inward LTG has a higher weight than the a normal LTG. An „inward LTG“ has 2 PCM lines connected to a LIC. All channels of those PCM lines may be used as signaling channels only. Failure of an inward LTG tears down up to 62 signaling channels.
SN1127EU13SN_0001
67
Siemens
68
Switching Network D (SND)
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
LTG 0 - X Speech switch
SNMUX 0-0 ACT -> SG_UNA
LTG 0 - Y Speech switch
SNMUX 0-1 ACT -> STB
MATM 0-0 ACT -> STB
SNMUX 1-0 STB -> ACT
SNMUX 1-1 STB -> ACT
MATM 1-0 STB -> ACT
Fig. 47 Interconnections LTG - SND switching network for DE6.1
SN1127EU13SN_0001
69
Siemens
3.3
Switching Network D (SND)
Path Setup
Call Processing determines the ports and speech channels of the A- and B-side of a call without any knowledge of the switching network type (SNB resp. SND). Afterwards it gives the order to setup the speech path in the switching network by calling the procedure OPPATSE_SELECT_SN_PATH of module PASDA (subsystem SC). For the SND there is no need to do any path hunting in the CP. Thus the procedure OPPATSE only composes the command SETUP PATH BIDIR according the old layout, using the information from call processing, i.e. LTG number and speech channel number of A- and B-side. The command is sent to both sides of the SND by selecting one of the available S3 (MATC) channel for each side from the bit map located in the transient database. The S3 channel selection logic must result in an equal load distribution over the available channels. The introduction of SND offers call processing a maximum of sixteen S3 channels per side (exchange type with a SNMAT) to reach the MATC. The maximum number of channels depends on the MBDHs on the MBD. . An exchange type with only SNMUXs (one or two SNMUXs) has two S3 channels. That means the S3 interface can be connected to the SNMAT (16 channels) or the SNMUX (2 channels). CALLP needs the S3 interface to get access to the switching matrix on the SNMAT or on the SNMUX. Access means a path is available. To determine if a path is available CALLP gets a bit map which states channel on or off. The advantage of the bit map is that CALLP is independent from the DE-type. The bit map is located in the transient database in common memory.
70
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
SND
SNMUX-0-15 126 LTG connections
OML
LILD 0..7
SNMAT-0-0
OML MATM-0-7
SNMUX-0-1 126 LTG connections
OML
LILD 0..7
OML S1.X1
S1.X0
MATM-0-0
SNMUX-0-0 126 LTG connections
LILD 0..7
OML MATC 0-0
OML S3 Interface without SNMAT (max. 2 SNMUXs, always 2 channels )
S1.X0 S1.X1
S3 Interface (with SNMAT, max. 16 channels)
MBD
max. 16 S3 channels, 2 from each MBDH to the MBDCG
MBDH0-0
MBDH0-7
MBDCG0-0
Fig. 48 SND maintenance channels ( S1 & S3 )
SN1127EU13SN_0001
71
Siemens
3.4
Switching Network D (SND)
Cross Office Check (COC)
Speech path setup while establishing a new call includes a COC mechanism which involves Call Processing as well as the LTGs participating in the connection. Before switching the connection through, the selected speech path is tested with a looped pattern. In case of failure there are two trials with other paths before Call Processing gives up and the call attempt is rejected. Errors identified are reported in ADDA messages to FD:COC, which performs two tasks: l
ADDA messages are analyzed and the fault is localized to a configurable unit. After localization the fault is reported to FA:SN in order to initiate configuration of this unit to STB (switchover) or UNA.
l
While TEST SN/TSG/SSG is running, ADDA messages related to the tested units are routed to the testing program. Those errors are not evaluated by FD:COC.
The online speech path supervision of the SND eliminates the need for evaluating ADDA messages to address speech path faults. The COC method depends on traffic density and needs long time to accumulate enough proof for fault localization. The new online mechanism provided by the SND is at least as fast. In addition it is active during the entire call. The online speech path supervision of the SND is also eliminating the MML commands TEST SN/TSG/SSG. Therefore, if an SND is being used, the evaluation of ADDA is not needed any more. Note that another usage of COC is still valid with the SND. This is the MML command START SNBERC. This command allows an operating company to run speech path quality tests for the SN in use.
3.5
Upgrade of SND
A non service affecting upgrade of the SND inside the allowed range defined by the DETYPE can be done by MOD SNDAT and CONF SNMUX commands. Three situations must be distinguished: In case additional LTGs are to be connected and the SNMUX is not fully equipped with LILD the following steps must be executed:
72
l
by CONF SNMUX the SNMUX of one SND side is configured from ACT -> MBL. The system automatically switches the LTGs to the other SND side (if the LTGs are not already switched to that side).
l
by MOD SNDAT the max. number of LTGs connected to the SNMUX is increased. The new max. number of LTGs and thus LILDs is updated in the semipermanent and transient SNMUX database. The additional LILD is plugged.
SN1127EU13SN_0001
Siemens
Switching Network D (SND)
l
by CONF SNMUX the SNMUX is configured back to service from MBL -> ACT. The additional LILD is automatically activated. Note, that the execution of this step may take some time in case of a DE60, because here the SNMUX provides the „switching matrix functionality“ and it therefore has to be updated for all speech connections, which takes some time.
l
having completed the last step the same procedure is repeat for the other SND side.
In case additional LTGs are to be connected to the second SNMUX being in PLA, the procedure quite similar as above, however no deactivation of a SNMUX and switch over of LTGs is necessary: l
by MOD SNDAT the max. number of LTGs connected to the second SNMUX is administered. The max. number of LTGs and thus LILDs is updated in the semipermanent and transient SNMUX database. The required LILD(s) are plugged.
l
by CONF SNMUX the SNMUX is configured from PLA -> MBL -> ACT. The administered LILDs are automatically activated.
l
having completed the last step the same procedure is repeat for the SNMUX within the other SND plane
In case the maximum configuration for one DE Type has been reached and additional LTGs are to be connected an installation recovery must be started for increasing the DE-Type and thus the SND size (see paragraph above). However this is happens very seldom (every 252 LTGs), i.e. once in a few years. Therefore the negative impacts related with such a recovery level are accepted. SND-Ausbaustufen im F:SNMAT MATM 7
SU 1
OML 920
OML 920
MATM 6
OML 920
OML 920
MATM 5
OML 920
OML 920
MATM 4
OML 920
MATC
OML 920
PWR A
MATM 3
OML 920
OML 920
MATM 2
OML 920
OML 920
MATM 1
OML 920
OML 920
MATM 0
OML 920
OML 920
SU 2 SU 3 SU 4 SU 5
OML 71
OML 70 OML 61
OML 60 OML 51
OML 50 OML 41
OML 40
OML 31
OML 30 OML 21
OML 20 OML 11
OML 10 OML 01
OML 00
OML 73
OML 72 OML 63
OML 62 OML 53
OML 52 OML 43
OML 42
OML 33
OML 32 OML 23
OML 22 OML 13
OML 12 OML 03
OML 02
SU 6 SU 7
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
OML 920
SU 10
Backplane view
2016 LTGs
1764 LTGs
1512 LTGs
1260 LTGs
1008 LTGs
756 LTGs
504 LTGs
OML 920
PWR A
OML 920
SU 9
OML 920
MBC
OML 920
SU 8
252 LTGs
Fig. 49 SND expansion steps in F:SNMAT
SN1127EU13SN_0001
73
Siemens
74
Switching Network D (SND)
SN1127EU13SN_0001
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