Contents
Issue 4 May 2002 vii 555-233-123
■ Preventive Maintenance Procedures 5-24
■ System Features 5-25
■ Troubleshooting Backplane Voltage Problems 5-50
■ Multimedia Call Handling (MMCH) 5-51
■ Install DS1 CPE Loopback Jack (T1 Only) 5-58
■ ATM Tips 5-71
■ Unusual ATM trouble conditions 5-97
6 Reliability Systems: A Maintenance Aid 6-1
■ General 6-1
■ Reliability Options 6-3
■ Duplicated Hardware 6-4
■ Duplication Concepts 6-10
■ System Technician Commands for
High and Critical Reliability Systems 6-15
■ Processor Complex Circuit Pack LED Strategies 6-19
■ Repair Procedures for High and Critical Reliability 6-21
■ Procedure for Installing/Replacing
the Inter-Cabinet Cable 6-34
■ Blocking Standby SPE Maintenance
Activities for System Testing 6-35
7 LED Interpretation 7-1
■ General 7-1
■ Terminal Alarm Notification 7-2
■ Processor and Maintenance Circuit
Pack LEDs 7-3
■ Duplication Interface circuit pack LEDs 7-4
■ Attendant console LEDs 7-6
■ Cabinet power unit LEDs 7-6
■ Power Distribution Unit LEDs 7-6
■ Control and port circuit pack status LEDs 7-7
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