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ATM-BCH (ATM B-Channel Trunk)
Issue 1 June 2005 517
ISDN Test Call Test (#258)
This nondestructive test performs a far-end loop-around test over an ATM-BCH trunk if:
● The trunk is IN-SERVICE, MAINTENANCE/NEAR-END, or OUT-OF-SERVICE/
NEAR-END.
● No calls are active on the trunk.
● The system uses country protocol 1 (including US), or the far end has loop-around
capability.
The test sets up a call to a far-end switch over the ATM-BCH trunk. Then the digital port on a
TN711D Maintenance/Test circuit pack sends a bit pattern to the far end and back. If the
received pattern matches that sent, the test passes. If there are differences, it fails.
Synchronous Test Calls
You can initiate a synchronous outgoing test call (including a test call for ISDN-PRI trunks) with
these commands:
● test trunk grp#/mem# long (repeat#)
● test board location long (repeat#)
● test port location long (repeat#)
Table 164: Test #258 ISDN Test Call
Error
Code
Test
Result
Description / Recommendation
4 ABRT Signaling channel problem
1. Look for errors or alarms against ATM-SGRP (ATM Signaling
Group) on page 598 and ATM-DCH (ATM D-Channel Port) on
page 522.
8 ABRT TN230x circuit-pack problem
1. See ATM-INTF (TN2305/6)
on page 573.
1004 ABRT B channel is active.
1. See if a call is active. Run status trunk grp#/mem#.
2. If the service state is In-Service/Idle, retry the test.
1005 ABRT Bad configuration (for example, no Maintenance/Test circuit pack)
1. Make sure that the Maintenance/Test circuit pack is inserted.
2. Repeat the test.
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