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MERLIN LEGEND Communications System Release 6.1
Network Reference
555-661-150
Issue 1
August 1998
Troubleshooting
Page 6-25Excessive Line Noise on Voice and Data Calls
6
Excessive Line Noise on Voice and
Data Calls 6
Possible Cause: Clocks are not properly synchronized.
What to Do: The coordinating system manager should check error logs at
problem systems. If slips are occurring at a high rate or an alarm was raised, clock
synchronization is a problem. The coordinating system manager should then
check the programming for the PRI tandem trunk(s) and/or PSTN digital facilities
that carry the calls. A single clock source is used for all networked systems so that
calls are properly synchronized. For details about clock synchronization in a
private network, see “Clock Synchronization” on page 6
. To program clock
synchronization, see Chapter 4 of
System Programming
.
If the clock source is correct, ensure that the specified port is functioning properly
and has an in-service facility connected to it.
If this does not solve or explain the problem, call the Lucent Technologies Helpline
at 1 800 628-2888; consultation charges may apply.
Station Message Detail Recording
(SMDR) Reports Do Not Include
Calls across the Network 6
In Release 6.0 systems, when SMDR is programmed to report both incoming and
outgoing calls to an individual system, all UDP calls are also reported.
In Release 6.1 and later systems, SMDR can be programed to log all UDP calls or
to log no UDP calls. The SMDR option is programmed on individual private
network systems and is not set network wide. If a UDP call is received or routed
over a PSTN trunk, the call is recorded regardless of the setting for logging of
UDP calls on each system involved on the call.
SMDR reports may report calls using more than one call record on more than one
system. Depending upon how SMDR is programmed and how calls are routed,
you may need to consult several SMDR records to trace a call that is routed over
private network trunks.
For examples of SMDR reporting for calls routed across the private network, refer
to “Station Message Detail Recording (SMDR) in Chapter 3 of this guide.