Avaya S8700 Series, Maintenance Manual

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Maintenance-Object Repair Procedures
555-233-143 8-552 Issue 1 May 2002
Digital Line Electronic Power Feed/Positive
Temperature Coefficient/PPF Test (#11)
For TN413, and TN754 vintage 13 or earlier, this is an Electronic Power Feed
(EPF) restoral test. In this test, the processor requests that the EPF be turned on
for a given port, and an attempt is made to turn on the power supply to the station.
If no current is drawn, the station is probably not connected. If an overcurrent
condition is sensed, there may be a short in the loop. A message is returned
reporting that either the EPF was successfully turned on, or that an overcurrent
condition was sensed. This test is repeated again 5 seconds later.
For TN754 vintage 14 or later, TN754B and TN2136 this is a Positive Temperature
Coefficient (PTC) restoral test. In this test, the processor requests that the PTC
be turned on for a given port, and an attempt is made to turn on the power supply
to the station. If an overcurrent condition is sensed, there is probably a short on
the power line that causing the PTC to open and disconnect the voice terminal.
Since the PTC does not have self-restoral capability, the voice terminal must be
1004 ABORT The port was seized by a valid call during the test. The test has been aborted.
1. Enter display port UUCSSpp to determine the station extension or
attendant number of the port. Use status station or status attendant to
determine the service state of the port. If the port is in use, wait until it is
idle before testing. Attendants are always in use (off-hook) if the handset
is plugged in and the port is not busied out.
1020 ABORT Test disabled via background testing. Use status station command to
determine when station is available for testing.
2000 ABORT Response to the test request was not received within the allowable time period.
1. Retry the command at 1-minute intervals up to 5 times.
1, 2 FAIL The Network Processing Element (NPE) of the tested port was transmitting in
error.
Error code 1 = Crosstalk test failed on the primary channel.
Error code 2 = Crosstalk test failed on the secondary channel.
1. Replace circuit pack.
PASS The port is correctly using its allocated time slots.
1. To verify that this is not an intermittent problem, repeat this test up to 10
times.
2. If complaints persist, examine the station, connections, and wiring.
Table 8-221. Test #9 Digital Line NPE Crosstalk Test — Continued
Error
Code Test
Result
Description / Recommendation
Continued on next page