Issue 1
December 1997
xv
Contents
Interface Circuitry
Maintenance Features and Modes
Power Circuitry
OHCTL Quick Reference Summary
Functions
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Synchronization
Synchronization Functions
BBF2B/BBF4 TGS/TG3 Circuit Pack Description
Purpose of Circuit
TG Faceplate Indicators
General Description of Operation
DS1 Timing Output
Detailed Description of Operation
Control Circuitry
Timing Circuitry
Clock Output Functions
Protection Circuitry
Fault Detection Circuitry
Power Circuitry
TG Hardware Settings
TG Quick Reference Summary
Provisioned Modes
Holdover Mode
Maintenance and Control
DS1 Output
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Transmission
BBG11 3DS3 Circuit Pack Description
Purpose of Circuit
BBG11 3DS3 Faceplate Indicators
General Description of Operation
Detailed Description of Operation
Transmission Circuitry
Control Circuitry