N-GEN Communications Web-based Seminars ©NGCS

Seminar - An Overview of Communications Technologies

Module 5 - SONET, WDM, DWDM and B-ISDN Technologies                                                             Slide 45 of 76 _________________                                                                                  __________

                                               SONET Layers

                                                  Section Layer

                                                  Line Layer

                                                  Path Layer 

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The SONET standards define hierarchical layered structure. Each layer handles intralayer communications independently and is responsible for a portion of the overall link management..

Section Layer - Looks after the link between Line Terminating Equipment and Optical Regenerators.

Line Layer - Responsible for Line Terminating Equipment and Add/Drop Multiplexer.

Path Layer - Provides communications between network terminating points.