Tab le of Conten ts
Issue 3 June 2001 5-i
5
Transmission and
Synchronization Interfaces
Overview 5-1
Transmission Interfaces 5-2
Ring Interfaces 5-16
â– OC-3/OC-12 Ring (0x1) 5-16
â– DS3DataServicesonanOC-3Ring 5-19
â– OC-3/OC-1 Ring (0x1) 5-20
â– OC-1 Ring Function Unit Pass-Through 5-23
â– OC-1/OC-1 Function Unit Hairpin Ring 5-24
Synchronization Interfaces 5-28
â– Timing Modes 5-28
â– Free-Running 5-28
Line Timing 5-28
DS1 External 5-29
Holdover 5-29
â– DS1 Output Modes: MULT and SYNC OUT 5-29
DS1 Output Mode, MULT 5-29
DS1 Output Mode, SYNC OUT 5-30
â– Synchronization Messaging 5-34
Applications 5-35
Feature Details and Options 5-39
Examples 5-42
â– Dual Homing DRI Synchronization Configurations 5-50
OC-3 and FT-2000 OC-48 Lightwave System 5-50