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Maintenance Objects
1890
Issue 5 October 2002
VC DSP Port NPE Crosstalk Test (#1103)
This test is destructive.
The NPE controls port connectivity and gain and provides conferencing functions.
The NPE Crosstalk test verifies that this port’s NPE channel talks on the selected
time slot and never crosses over to time slots reserved for other connections. If
the NPE is not working correctly, one-way and noisy connections may be
observed. This test is part of the port’s long test sequence and takes
approximately 20 to 30 seconds to complete.
VC DSP Port Local TDM Loopback Test (#1104)
This test is destructive.
This test verifies the connectivity of a VC DSP Port across the TDM bus. It aborts
if calls associated with the port are in progress. Failure of this test indicates an
on-board fault associated with the port hardware on the circuit pack. The
Loopback Test runs the following tests (refer to
Figure 63 on page 1891 ):
1. A looparound test across the TDM bus.
2. A conference circuit test.
The tests are run in the above order; if one test fails, an error code is returned and
the remaining tests in the sequence are not executed.
Table 566. TEST #1103 VC DSP Port NPE Crosstalk Test
Error
Code Test
Result Description/ Recommendation
1000
1001 ABORT System resources required to run this test are not available. The port may
be busy with a valid call.
1. Retry the command at 1-minute intervals a maximum of 5 times.
2012 ABORT Internal system error
2100 ABORT Could not allocate the necessary resources to run this test.
1. Retry the command at 1-minute intervals a maximum of 5 times.
0-3 FAIL The NPE of the tested port was transmitting in error. This causes noisy and
unreliable connections.
1. Replace circuit pack.
PASS The port is correctly using its allocated time slots.
1. To be sure that this is not an intermittent problem, repeat this test a
maximum of 10 times to make sure that it continues to pass.
2. If complaints still persist, examine the station, connections, and wiring.
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