Review on Data transmission in SONET & SDH

Authors

  • Payal Dhull Research Scholar, Department ECE, IIET
  • Kapil Sachdeva Assistant Professor, Department- Ece ,Iiet

Keywords:

protocol, Hierarchy, Synchronous, coherent

Abstract

Synchronous Optical Networking & Synchronous Digital Hierarchy are standardized protocols that transfer multiple digital bit streams synchronously over optical fiber using lasers or highly coherent light from light-emitting diodes. At low transmission rates data could also be transferred via an electrical interface. method was developed to replace plesiochronous digital hierarchy (PDH) system for transporting large amounts of telephone calls & data traffic over same fiber without synchronization problems. SONET generic criteria are detailed in Telcordia Technologies Generic Requirements document GR-253-CORE. Generic criteria applicable to SONET & other transmission systems (e.g., asynchronous fiber optic systems or digital radio systems) are found in Telcordia GR-499-CORE. SONET & SDH, which are essentially same, were originally designed to transport circuit mode communications (e.g., DS1, DS3) from a variety of different sources, but they were primarily designed to support real-time, uncompressed, circuit-switched voice encoded in PCM format.[3] primary difficulty in doing this prior to SONET/SDH was that synchronization sources of these various circuits were different. This meant that each circuit was actually operating at a slightly different rate & with different phase. SONET/SDH allowed for simultaneous transport of many different circuits of differing origin within a single framing protocol. SONET/SDH is not a communications protocol in itself, but a transport protocol.

References

ITU-T Standard G.707, ―‗Network node interface for synchronousdigital hierarchy,‖ ZW0. pp. 118-126.

ANSI Tl.105-2001, ―Synchronous optical network (SONET). Basic description including multiplexing smcme, rates md formats,‖ .

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R. Doverspike & P. Magill, ―Chapter 13in Optical Fiber Telecommunications V inCommercial Optical Networks, Overlay Networksand Services‖. Amsterdam, Netherlands:Elsevier, 2008.

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Published

30-06-2016

How to Cite

Payal Dhull, & Kapil Sachdeva. (2016). Review on Data transmission in SONET & SDH. International Journal for Research Publication and Seminar, 7(3). Retrieved from https://jrps.shodhsagar.com/index.php/j/article/view/804

Issue

Vol. 7 No. 3 (2016): April - June 2016

Section

Original Research Article

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Copyright (c) 2016 International Journal for Research Publication and Seminar

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