Cvoice 6.0 S02 L01

Understanding Call Types

Configuring Voice Ports

© 2008 Cisco Systems, Inc. All rights reserved.

CVOICE v6.0—2-1

Call Types  Local: Does not traverse the WAN or PSTN.  On-net: Occurs between two telephones on the same data network.  Off-net: Occurs when a user dials an access code (such as “9”) to gain access to the public switched telephone network (PSTN).  PLAR: Automatically connects one telephone to a second telephone.  PBX-to-PBX: Originates at one PBX and terminates at another.  Intercluster trunk calls: Occurs when calls are routed by two separate Cisco Unified Communications Managers.  On-net-to-off-net: Occurs when calls originate on an internal network and are routed to an external network (usually the PSTN). © 2008 Cisco Systems, Inc. All rights reserved.

CVOICE v6.0—2-2

Local Calls

Dial “555-0188”

PBX

555-0188

Ring!

IP WAN Gateway

© 2008 Cisco Systems, Inc. All rights reserved.

Gateway

CVOICE v6.0—2-3

On-Net Calls PBX

Dial “555-0123”

Ring!

555-0123

IP WAN Gateway

Austin

Toll Bypass

Gateway

San Jose

PSTN

© 2008 Cisco Systems, Inc. All rights reserved.

CVOICE v6.0—2-4

Off-Net Calls Dial Access Code “9”

Ring!

PSTN

Gateway

© 2008 Cisco Systems, Inc. All rights reserved.

CVOICE v6.0—2-5

PLAR Calls

PBX

Ring!

555-0199

Voice Port Configured to Dial: “555-0199” IP WAN

Gateway

© 2008 Cisco Systems, Inc. All rights reserved.

Gateway

CVOICE v6.0—2-6

PBX-to-PBX Calls PBX A

User Dials 555-0150

555-0150

PBX B

Ring!!

IP WAN Gateway

Toll Bypass

Gateway

PSTN © 2008 Cisco Systems, Inc. All rights reserved.

CVOICE v6.0—2-7

Intercluster Trunk Call Cisco Unified Communications Manager Site A

Cisco Unified Communications Manager Site B

IP IP WAN

© 2008 Cisco Systems, Inc. All rights reserved.

CVOICE v6.0—2-8

On-Net-to-Off-Net Call

1.

2.

WAN is down or congested.

4.

IP WAN Gateway

3.

Toll Bypass

Gateway

PSTN

© 2008 Cisco Systems, Inc. All rights reserved.

CVOICE v6.0—2-9

Summary  There are seven typical call types in a VoIP network.  A local call is handled entirely by the router and does not travel over an external network.  On-net calls can be routed through one or more voice-enabled routers, but the calls remain on the same network.  An off-net call occurs when a user dials an access code (such as 9) from a telephone that is directly connected to a voice-enabled router or PBX to gain access to the PSTN.

© 2008 Cisco Systems, Inc. All rights reserved.

CVOICE v6.0—2-10

Summary (Cont.)  PLAR calls automatically connect one telephone to a second telephone when the first telephone goes off hook.  A PBX-to-PBX call originates at one PBX and terminates at another PBX while using the network for voice transport.  Intercluster trunk calls are routed between Cisco Unified Communications Manager clusters using a trunk.  On-net to off-net calls originate on an internal network and are routed to an external network.

© 2008 Cisco Systems, Inc. All rights reserved.

CVOICE v6.0—2-11

© 2008 Cisco Systems, Inc. All rights reserved.

CVOICE v6.0—2-12