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DEFINITY ECS Release 8.2 Maintenance for R8.2csi

555-233-119 Issue 1

April 2000

Maintenance Objects

3-512DIG-LINE (Digital Line)

Digital Line NPE Crosstalk Test (#9)

One or more Network Processing Elements (NPEs) reside on each circuit pack

with a TDM Bus interface. The NPE controls port connectivity and gain, and

provides conferencing functions on a per-port basis. 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 a port’s Long Test Sequence and takes about 20 to 30 seconds to

complete. Crosstalk testing is performed on both the primary information channel

(voice) and the secondary information channel (data) associated with each

digital station port. If this test fails on either channel, the station and the DTDM

are taken out-of-service.

16 FAIL The secondary channel (data Information Channel 2 or I2 is not operating

properly. User impact may range from noticing nothing to not being able to

use this terminal. Check the results of Voice and Control Channel Local

Loop Test (#13). If that test fails, suspect the Digital Line circuit pack. If

that test passes then replace the terminal. If both test fail, and component

replacement does not change the results, then:

1. Run circuit pack tests to check the tone generator circuit pack and the

Tone Detector circuit pack using the test board PCSSpp command.

2. Resolve any problems that are detected on the Tone Generator circuit

pack or Tone Detector circuit pack.

3. If the Tone Generator and Tone Detector circuit pack are functioning

properly, and the tests still fail, escalate the problem.

PASS Voice and Control Channel Local Loop test passed. All channels are

transmitting properly.

1. To be sure that this is not an intermittent problem, repeat this test up to

a maximum of ten times to make sure it continues to pass.

2. If complaints persist (noisy connections for voice. corrupted data

transfer for data), examine the station, connections, and wiring.

Table 3-215. TEST #1201 Digital Terminal Remote Loop Around Test — Continued

Error

Code

Te s t

Result Description/ Recommendation

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