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prSSH ETS 300 746:1997 ed.1

Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); Network protection schemes; Automatic Protection Switch (APS) protocols and operation

General information

40.20     Feb 9, 2026

40.60    May 11, 2026

DPS

DPS/KT 10

European Norm

Scope

This European Telecommunication Standard (ETS) specifies the Automatic Protection Switching (APS) requirements, switching initiation criteria, and the APS protocols of Synchronous Digital Hierarchy (SDH) multiplex section shared protection ring, multiplex section dedicated protection ring, multiplex section linear protection, and path trail and Sub-Network Connection (SNC) protection schemes. The APS protocols are specified in terms of their multiplex section or path overhead requirement, the signalling messages and their operations under various failure conditions.

Life cycle

NOW

IN_DEVELOPMENT
prSSH ETS 300 746:1997 ed.1
40.20 DIS ballot initiated: 12 weeks
Feb 9, 2026

Related project

Adopted from ETS 300 746: February 1997

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