Att System 25 Manuel d'utilisateur télécharger pdf (Page 189)

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101

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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Att System 25 Manuel d'utilisateur Page 189

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