ETSI TS 101 009

Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); Network protection schemes; Types and characteristics Edition: 1.1.1
European Telecommunications Standards Institute / 01-Nov-1997 / 96 pages

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Describes the network objectives, architectures, applications, auto- matic protection switching (APS) functionality, switching initialis n criteria operations of STH shared mpx section bidirectional uni- directional self healing rings (MS-BSHR, MS-USHR), dedicated path switching ring.