AT&T 3.0 manual Trouble Reports, Automatic Tests, Alarms

Maintenance Strategy

Trouble Reports

System trouble can be reported in two ways:

■By users

■By system alarms (permanent errors)

Automatic Tests

The system performs ongoing maintenance automatically by running tests that:

Monitor the status of equipment.

Audit operations consistency.

Detect hardware malfunctions.

Without disrupting normal service, the tests check hardware and software that are in service. The system registers any errors it detects in the error logs and corrects them automatically, if possible.

Alarms

If the automatic tests indicate serious error conditions, the system generates an alarm. Depending on how the system is programmed, the system announces an alarm condition in one of the following ways:

■An LED for a line or feature button turns on at an operator console or other designated telephone.

■The red status LED on the processor module lights.

■In Release 3.0, the error code/status display on the processor module displays F if a frigid start, or C if a cold start occurs. See “System Restart” for details about frigid start (System Erase) or cold start (Restart).

Introduction 1-19