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2.
MAINTENANCE PHILOSOPHY
Troubleshooting
Introduction
Maintenance of the system consists of repair and preventive
2.1
maintenance. Repair covers isolation of faults, troubleshooting to the circuit
card level, and subsequent replacement of the faulty circuit card. Circuit card
repair is not covered. Preventive maintenance covers periodic routine tasks
that are performed to ensure continued proper operation of the system.
The system incorporates both software- and firmware-based
2.2
diagnostics to continuously monitor system integrity. Also available are
diagnostics that can be manually invoked. Problems detected by diagnostics
are reported as alarm/event messages displayed at a user terminal and/or
lighted alarm indicators on the equipment. These messages and lights are the
primary trouble analysis tools for fault isolation.
The instruction "contact next level of technical support for assistance"
2.3
appears throughout this manual. The intent of this statement is to trigger
escalation of problems that are beyond the scope of this Task Oriented Practice
(TOP) to a higher level of expertise. Users who have local interim levels and/or
procedures should implement those in response to this instruction. Refer to
Introduction for customer access (HELP) contacts.
Troubleshooting procedures generally assume the following
2.4
conditions:
•
An alarm indication was received through a user terminal or a lighted
alarm indicator.
•
Maintenance personnel are familiar with system operation and use of
the TL1 language.
•
Maintenance personnel have system administration privileges or a
system administrator is available.
•
Replacement components (spares) are available and fully functional.
3EM13853AF
Issue 01, September 2007
1-5
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