Lucent Technologies MERLIN LEGEND Release 6.0 Network Reference Manual page 208

MERLIN LEGEND Communications System Release 6.0
Network Reference 555-660-150
6 Troubleshooting
Call to Non-Local Extension: Silence or Fast Busy Tone
costs than routes that specify tandem facilities, you may need to adjust
extension and route FRLs in order to restrict access to them. Be sure that
you discuss any changes with the coordinating system manager.
If the routing is correct and enough routes are included in the pattern, but
the problem persists, check if PRI lines are used. If they are, check the
error log for D-channel inoperative and loss of signal alarms indicating lines
are inoperative. If the D-channel inoperative alarm has occurred, check the
CSU/DSU associated with the line for correct programming. If the loss at
signal alarm has occurred, check for open cables, etc. If these conditions
are not present, go to Possible Cause 3.
Possible Cause 2: Callback Queuing is not used.
What to Do: All available local routes for the call may be busy, and Automatic or
Selective Callback allows the call to queue for the next available tandem trunk
assigned to the Route 1 pool. As a first step, the caller should try using Callback.
If a user is having trouble with the Callback feature, see
on page 6–18.
Possible Cause 3: Not enough trunks are assigned to the pools for UDP routes.
What to Do: Consult System Form 2c, System Numbering: Line/Trunk Jacks to
determine the assignments. To see a report of pool assignments, select the
option on the System Programming menu and then choose
.
If more trunks are available and need to be assigned, follow the procedure
in "Trunks to Pools Assignment" in Chapter 4 of System Programming to
assign more tandem trunks. All the tandem trunks in a pool must be of the
same type (tie or PRI).
If not enough trunks are available, consider adding more to your system.
If there are sufficient trunks assigned but the problem persists, go to
Possible Cause 4.
Possible Cause 4: Facilities are available but restricted and the caller is not able
to access them.
What to Do: Verify that the extension's FRL is higher than or equal to the UDP
route FRL.
If you want to make changes in FRLs for routes, speak with the coordinating
system manager for your network and consult the following resources:
"How Facility Restrictions Levels Work in a Network" on page 4–9
discusses FRL planning in detail.
Issue 1
February 1998
Page 6-6
"Callback Does Not Work"
and