ATM-BCH (ATM B-Channel Trunk)
Issue 1 May 2002
8-179555-233-143
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#/mbr# long [repeat#]
■ test board UUCSS long [repeat#]
■ test port UUCSSpp long [repeat#]
Table 8-74. Test #258 ISDN Test Call
Error
Code
Tes t
Result Description / Recommendation
4 ABORT Signaling channel problem
1. Look for errors or alarms against the ‘‘ATM-SGRP (ATM Signaling Group)’’
and ‘‘ATM-DCH (ATM D-Channel Port)’’ MOs.
8 ABORT TN230x circuit-pack problem
1. See the ‘‘ATM-INTF (TN2305/6)’’ MO.
1004 ABORT B channel is active.
1. See if a call is active. Run status trunk grp#/mbr# command.
2. If the service state is In-Service/Idle, retry the test.
1005 ABORT Bad configuration (for example, no Maintenance/Test circuit pack)
1. Make sure that the Maintenance/Test circuit pack is inserted.
2. Repeat the test.
1018 ABORT Test call disabled
1. Enable Maintenance on the Trunk Group form.
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