Table of Contents
Issue 1 December 1997 5-i
5
Transmission and
Synchronization Interfaces
Overview 5-1
Transmission Interfaces 5-1
■ OC-12 STS-1 Path Switched Ring 5-2
■ Dual Ring Interworking (DRI) 5-4
■ OC-3/OC-12 Ring (0x1) Low-Speed Interfaces 5-4
■ Linear (1+1) Optical Extension Between OC-12 and OC-3 5-8
Synchronization Interfaces 5-10
■ Free-Running 5-10
■ Line Timing 5-10
■ DS1 External 5-10
Holdover 5-11
■ DS1 Output Modes: MULT and SYNC OUT 5-11
DS1 Output Mode, MULT 5-11
DS1 Output Mode, SYNC OUT 5-12
■ Synchronization Messaging 5-16
Applications 5-16
DS1 Timing Output Integrity 5-17
Automatic Synchronization Reconfiguration 5-19
Synchronization Provisioning Integrity 5-21
Feature Details and Options 5-21
Examples 5-24
■ Network Timing Distribution 5-30
Interoffice Timing Distribution 5-30
Access Network Timing Distribution 5-32
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