Issue 1 December 1997 xv
Contents
Interface Circuitry 7-15
Maintenance Features and Modes 7-15
Power Circuitry 7-15
OHCTL Quick Reference Summary 7-15
Functions 7-15
â– Synchronization 7-16
Synchronization Functions 7-16
BBF2B/BBF4 TGS/TG3 Circuit Pack Description 7-16
Purpose of Circuit 7-16
TG Faceplate Indicators 7-17
General Description of Operation 7-18
DS1 Timing Output 7-18
Detailed Description of Operation 7-19
Control Circuitry 7-19
Timing Circuitry 7-20
Clock Output Functions 7-21
Protection Circuitry 7-21
Fault Detection Circuitry 7-22
Power Circuitry 7-22
TG Hardware Settings 7-22
TG Quick Reference Summary 7-24
Provisioned Modes 7-24
Holdover Mode 7-24
Maintenance and Control 7-24
DS1 Output 7-24
â– Transmission 7-25
BBG11 3DS3 Circuit Pack Description 7-25
Purpose of Circuit 7-25
BBG11 3DS3 Faceplate Indicators 7-25
General Description of Operation 7-26
Detailed Description of Operation 7-26
Transmission Circuitry 7-26
Control Circuitry 7-28
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