DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127 Issue 1
August 1997
Maintenance Object Repair Procedures
Page10-764ISDN-TRK (DS1 ISDN Trunk)
10
ISDN Test Call Test (#258)
This test performs a far-end loop around to a far-end switch over an ISDN trunk.
The trunk’s service state must be in-service, maint-NE, or out-of-service/NE, and
no call can be active on the trunk. The test call can be initiated as part of a long
test sequence, or as an individual test, as described below. This test is valid only
for systems using country protocol 1 (including US), or when the far end has
loop-around capability.
A test call connection is established to a far-end switch over the ISDN trunk to b e
tested. The digital port on a TN711D Maintenance/Test circuit p ack generates a
test-pattern bit stream which is sent to the far-end switch and echoed back. The
received pattern is then compared to the sent pattern and checked for errors that
indicate a loss of integrity on the communications path.
If a test call is running when scheduled maintenance starts, the green LED is
turned off. To determine if a test ca ll is still running, use the list isdn-testcall and
status isdn-testcall commands. A lit yellow LED on the Maintenance/Test circuit
pack also indicates that a test call is running.
1113 ABORT The signaling link has failed, so the system cannot send any messages on
behalf of this trunk.
1. Check the results of Test #255 (Signaling Link State Check).
1114 ABORT The signaling link is in a transitional state.
1. Retry the command at 1-minute intervals a maximum of 5 times.
1116 ABORT The trunk is in an out-of-service ISDN service state.
1. A call cannot be present if the trunk is in an ISDN out-of-service state,
so a call state audit would be inappropriate. No act ion n ecess ary . (Use
the status trunk
2100 ABORT Could not allocate the necessary system resources to run this test.
1. Retry the command at 1-minute intervals a maximum of 5 times.
FAIL Internal system error
1. Retry the command at 1-minute intervals a maximum of 5 times.
PASS Thi s swit ch se nt a cal l sta te audi ting mes sage to the far-e nd switc h t o veri fy
the state of the call active on this trunk. If a call state mismatch is found,
then the call will be torn down withi n two minutes. If no call was active, then
no message was sent.
Table 10-255. TEST #257 Call State Audit Test — Continued
Error
Code Test
Result Description/ Recommendation
Continued on next page