ADTRAN 25 Station, Wiring, and Trunk Problems, Automatic Maintenance Tests, Maintenance Failure

MAINTENANCE

Station, Wiring, and Trunk Problems

If the system indicates that a fault is with a station, or if a user complaint indicates a station problem, the trouble must be isolated to the station itself or to the wiring between the cabinet or station interconnect panel and the station.

The station wiring, particularly the mounting cord, should be visually inspected in cases of station trouble reports. A dead station could be caused by a loose mounting cord. Station trouble can also occur when wiring is crushed or severed by furniture or traffic. Stations can be swapped with known good stations of the same type to help isolate the trouble.

Trunk problems reported by alarms or by users can be evaluated with tests from stations or by interpreting the error log. If trunk troubles appear to be outside the System 25, the responsible common carrier should be asked to make repairs.

Automatic Maintenance Tests

Because System 25 maintenance tests are performed automatically, no provision is made for users or technicians to initiate maintenance tests. The error log is read by entering commands from the SAT. Additional information that may help in clearing complex or subtle troubles is also available through the SAT (for example, the record of port locations).

Refer to the Administration Manual (555-540-500)for information on using “Search” procedures from the SAT as an aid in troubleshooting.

Maintenance Failure

If a System 25 equipment problem cannot be corrected using the procedures in this manual, follow established maintenance escalation procedures.

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