CONTENTS ix

8. MAINTENANCE AND ALARMS

GENERIC 1 AND GENERIC 2 ISDN-PRI MAINTENANCE PHILOSOPHY

GENERIC 2 MAINTENANCE CAPABILITIES AND CONCERNS

Generic 2 Maintenance Procedures

Summary of Generic 2 Maintenance Capabilities

GENERIC 1 MAINTENANCE CAPABILITIES AND CONCERNS

Generic 1 Maintenance Procedures

Summary of Generic 1 Maintenance Capabilities

ALARMS

Circuit Pack Alarms

Facility Alarms

A. ADMINISTRATION REQUIREMENTS

B. SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS

TRANSLATIONS-BASED PROBLEMS

TRUNKS AND TRUNK GROUPS

CDMs

CEMs

D4-Channel Banks

SYNCHRONIZATION-RELATED PROBLEMS

Loss of or No Synchronization

Leavenworth Loop

D4 Synchronization Problems

Digital CO Synchronization Problems

DACS

TYPICAL PHYSICAL INTERFACE CONNECTION PROBLEMS

Specific Cabling Options

System 85 DS1/DMI to System 85 DS1/DMI — Colocated Arrangement

System 85 DS1/DMI to System 75 DS1/DMI — Colocated Arrangement

System 85 DMI to Host Computer

System 85 DS1/DMI Direct to a NCTE

8-1

8-1

8-1

8-2

8-5

8-6

8-6

8-7

8-7

8-7

8-8

A-1

B-1

B-1

B-3

B-5

B-5

B-7

B-8

B-9

B-9

B-10B-12B-12B-13B-17B-18B-20B-21B-22

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AT&T DS1/DMi/ISDN-PRI manual Maintenance and Alarms