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Maintenance Object Repair Procedures
555-233-123 10-1138 Issue 4 May 2002
Analog Port Digital Loop Around Test (#13)
This test is a modification of the Voice and Control Channel Local Loop Test used
by Digital Station (DIG-LINE) maintenance. This test does not perform the control
channel and secondary information channel loop around tests as described for
DIG-LINE, as these data paths do not exist for the Maintenance/Test Analog Port.
The primary information channel is tested by first looping back the data channel
onto the TDM Bus, and then sending a digital count from the Tone-Clock circuit
pack and receiving the same digital count with a general purpose tone detector. A
conference test is done next for the primary information channel. This test is the
same as Conference Test (#6).
Only one value (Pass, Fail, or Abort) is generated as a result of the two tests. If
either fails or aborts, the sequence is stopped.
Any FAIL The NPE of the tested port was found to be transmitting in
error. This will cause noisy and unreliable connections.
1. If the remaining ports are currently not in use (yellow LED
is off), try to reset the circuit pack via the busyout board
PCSS, reset board PCSS, release board PCSS
command sequence. Then repeat the test.
2. If the test fails again, replace circuit pack.
PASS The port is correctly using its allocated time slots.
User-reported troubles on this port should be investigated by
examining station, trunk, or external wiring.
Table 10-428. TEST #9 NPE Cross Talk Test — Continued
Error
Code Test
Result Description/Recommendation
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