xiv Issue 1 December 1997
Contents
■ Universal Optical Connector 7-2
■ Control 7-4
Control Circuit Packs 7-4
BBG8/BBG8B SYSCTL Circuit Pack Description 7-5
Purpose of Circuit 7-5
BBG8/BBG8B SYSCTL Faceplate Controls and
Indicators 7-5
General Description of Operation 7-6
Detailed Description of Operation 7-6
Control Circuitry 7-6
Memory 7-6
Transmission/Timing Circuit Pack Interfaces 7-8
Operation Interfaces 7-8
OC-12 Transport Overhead Channel 7-8
Power Monitoring and Fan Control 7-9
Interface to Other DDM-2000 OC-12
Shelves 7-9
Power Circuitry 7-9
BBG8/BBG8B SYSCTL Hardware Setting 7-10
BBG8/BBG8B SYSCTL Quick Reference
Summary 7-11
Interface Functions 7-11
User Panel 7-11
Telemetry Functions 7-11
Maintenance Functions 7-11
BCP4 OHCTL Circuit Pack Description 7-12
Purpose of Circuit 7-12
Faceplate Indicator 7-12
General Description of Operation 7-13
Detailed Description of Operation 7-13
OC-12 Transport Overhead Channel 7-13
User Definable Miscellaneous Discrete
Environmental Alarms and Controls 7-13
X.25 Message-Based Operation Interface 7-13
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