xii
Issue 1
December 1997
Contents
5
Transmission and Synchronization Interfaces
■
Overview
■
Transmission Interfaces
OC-12 STS-1 Path Switched Ring
Dual Ring Interworking (DRI)
OC-3/OC-12 Ring (0x1) Low-Speed Interfaces
Linear (1+1) Optical Extension Between OC-12
and OC-3
■
Synchronization Interfaces
Free-Running
Line Timing
DS1 External
Holdover
DS1 Output Modes: MULT and SYNC OUT
DS1 Output Mode, MULT
DS1 Output Mode, SYNC OUT
Synchronization Messaging
Applications
DS1 Timing Output Integrity
Automatic Synchronization Reconfiguration
Synchronization Provisioning Integrity
Feature Details and Options
Examples
Synchronization Reconfiguration Using an
Externally Timed Access Ring
Synchronization Reconfiguration in an
Access Ring
Network Timing Distribution
Interoffice Timing Distribution
Access Network Timing Distribution