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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Routine Maintenance Procedures
Page 5-58System Features
5
Figure 5-10. Processing of PRI Endpoint Problems (Page 2 of 2)
Troubleshooting ISDN-PRI Test Call Problems
An ISDN-PRI test call is a call of a diagnostic nature that is placed across an
ISDN-PRI user-network interface to a previously designated number. An
ISDN-PRI test call is also a maintenance procedure concerned with the
identification and verification ISDN-PRI user-network interface problems. The
ISDN-PRI test call can access ISDN-PRI trunks only.
Placing an Outgoing ISDN-PRI Test Call
NOTE:
An ISDN-PRI test call can be placed only if the circuit translates to an
ISDN-PRI trunk.
Perform an in-depth
analysis of DS1
interface between the
switch and the
endpoint equipment,
including the premise
distribution wiring,
endpoint equipment,
and any other noise-
producing equipment.
YES
Are there
bit errors
over the DS1
interface between the
switch and the PRI
Terminal Adapter or
the ISDN endpoint
equipment. Use
‘‘list measurement’’
command.
NO
END
IF THE PROBLEM STILL EXISTS,
THEN ESCALATE
YES
IF PROBLEM STILL
EXISTS, THEN
ESCALATE
NO
FOLLOW REPAIR
PROCEDURE FOR
SYNC MO
Has a
synchronization
source been unstable?
System switching away
from it? Check
for alarms and
errors against
SYNC.
TRANSIENT FAILURES
FROM
PAGE 1
ALWAYS FAIL
CHECK THE HEALTH OF THE
APPLICATION EQUIPMENT
(FOR EXAMPLE, VIDEO CODEC)
AND THE HEALTH OF THE
DEFINITY NETWORK
Does
every
call fail or
are the
failings
transient?
A