ATM-BCH (ATM B-Channel Trunk)
Issue 5 October 2002
737
555-233-119
ISDN Test Call Test (#258)
This non-destructive test performs a far-end looparound 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
looparound capability
The test sets up a call to a far-end switch over the ATM-BCH trunk. 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 75. TEST #258 ISDN Test Call
Error
Code
Test
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)’’
maintenance objects.
8
ABORT
TN230x circuit-pack problem
1. See the
‘‘ATM-INTF (TN2305/6)’’
maintenance object.
1004
ABORT
B-channel in use.
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.
Continued on next page