National Institute Of Science & Technology

National Institute Of Science & Technology

SONET

Synchronous Optical Network (SONET) Technical Seminar Presentation By

Manjit Hota

Roll # EC200118144

Under the guidance of

Mr. Nalla Srinivasu Manjit Hota (EC200118144)

[1]

National Institute Of Science & Technology

SONET

SONET Standard for optical communication transport Formulated by ECSA for ANSI 1984 Defines  OCs  STSs Manjit Hota (EC200118144)

[2]

National Institute Of Science & Technology

SONET

Synchronization of Digital Signals Synchronous

Signal Asynchronous

 Digital transitions in the signals occur at exactly same rate  All clocks are traceable to one PRC. Transition of the signal does not occur at same normal rate

Plesiochronous Almost same rate & variation constrained within tight limits Manjit Hota (EC200118144)

[3]

National Institute Of Science & Technology

SONET

SONET Synchronous Hierarchy Signal

Bit Rate (Mbps)

STS–1, OC–1

51.840

STS–3, OC–3

155.520

STS–12, OC–12

622.080

STS–48, OC–48

2,488.320

STS–192, OC-192

9,953.280

Manjit Hota (EC200118144)

[4]

National Institute Of Science & Technology

SONET

Network Design Considerations for SONET Transmission Media

Optical fiber. Classified by bandwidth starting at OC-1 for 51.84 Mbps.

Bandwidth

Ranges from 51.84 Mbps(OC-1) to 9.95 Gbps (OC-192).

Application Support

Voice, data, video and audio over the same line.

Distance Limitations

Fees increase as distance increases.

Network Function

Typically the telephone company's backbone. Use for WAN solutions over leased lines for large corporations.

Cost

Very expensive. Monthly fees for OC-3 coast-to-coast > $400,000.

Manjit Hota (EC200118144)

[5]

National Institute Of Science & Technology

SONET

SONET System

Regenerator

Regenerator

STS MUX

STS MUX Add/Drop Multiplexer

Manjit Hota (EC200118144)

[6]

National Institute Of Science & Technology

SONET

SONET Protocol Stack Path Layer Line Layer Section Layer Data Link

Photonic Layer

Four Layers Photonic Layer Section Layer Line Layer Path Layer

Physical Manjit Hota (EC200118144)

[7]

SONET National Institute Of Science & Technology

SONET Frame 90 Columns

TOH

SPE

9 rows

3 columns 87 columns 90 octets/row * 8 bits/octet =720 bits/row 720 bit/roe * 920 rows/frame = 6480 bits/frame 6480 bits/frame * 8000 frames/second = 51.84 Mbps Manjit Hota (EC200118144)

[8]

National Institute Of Science & Technology

SONET

Overheads Simpler Multiplexing Greatly expanded Operation, Maintenance, Administration & Provisioning

Manjit Hota (EC200118144)

[9]

National Institute Of Science & Technology

SONET

SONET Multiplexing

Multiplexing principles Mapping Aligning Multiplexing Stuffing Manjit Hota (EC200118144)

[10]

National Institute Of Science & Technology

SONET

SONET Network Configurations Point to Point

PTE

REG

PTE

Point to Multipoint

PTE

REG

ADM

Manjit Hota (EC200118144)

REG

PTE

[11]

National Institute Of Science & Technology

SONET Hub Network

Ring Architecture

ADM

ADM

ADM

ADM

Manjit Hota (EC200118144)

[12]

National Institute Of Science & Technology

SONET

SONET & SDH Developed by CCITT Standard useful for interfacing between the CCITT & ANSI transmission hierarchies Developed in 1989 World wide standard & SONET can be considered as a subset of SDH Manjit Hota (EC200118144)

[13]

National Institute Of Science & Technology

SONET

Advantages of SONET Reduced Back-to-Back Multiplexing Optical Interconnect Multipoint Configurations Reduced Cabling Enhanced OAM&P Enhanced Performance Monitoring Manjit Hota (EC200118144)

[14]

National Institute Of Science & Technology

SONET

Applications of SONET SONET Can be used as a backbone or totally replace other networking protocols such as SMDS or FDDI Can support bandwidth on demand Can be the carrier for ATM cells Can be the carrier for ISDN and BISDN Can replace existing T-1 or T-3 lines Manjit Hota (EC200118144)

[15]

National Institute Of Science & Technology

SONET

Conclusion SONET was developed to promulgate standard optical transmission signal interfaces to allow mid-section needs of fiber optic system

Manjit Hota (EC200118144)

[16]

National Institute Of Science & Technology

SONET

Manjit Hota (EC200118144) [17]