Call To Non-Local Extension Silence Or Fast Busy Tone - Lucent Technologies MERLIN LEGEND Release 6.0 Maintenance And Troubleshooting Manual

MERLIN LEGEND Communications System Release 6.0
Maintenance and Troubleshooting 555-660-140
Central Office and Network Problems
Call to Non-Local Extension: Silence or Fast Busy Tone
!
SECURITY ALERT:
FRLs, applied to ARS and UDP routes, default class-of-restrictions (COR)
for all tie and/or all non-tie tandem trunks, extensions, and remote access
barrier codes are particularly important for maintaining security in a
network. Before changing FRLs in your system, check with the
coordinating system manager, who should understand the security
implications for your local system and for the network as a whole.
Changing local FRLs may not work simply because the problem is not on the
local system. In this case, see "Call to Non-Local Extension: Silence or Fast
Busy Tone" in Chapter 6 of Network Reference .
Call to Non-Local Extension:
Silence or Fast Busy Tone
The following are likely circumstances in which silence occurs when a call is
attempted:
A selected tie or analog facility between the caller or called
extension is out of service. If your system is linked by tandem tie
trunks and silence occurs, call the other system on a PSTN
line/trunk in order to determine whether a tie trunk is out of
service. If it is not, call the Lucent Technologies Helpline at 1 800
628-2888; consultation charges may apply.
No Touch-Tone Receivers (TTRs) available at a remote system
when using tie trunks. This can be verified by checking for the
0c03 error on the error log on the remote switches. If this error
persists, contact your local service representative.
A fast busy tone can have one of several causes. Before investigating further,
check the following possibilities:
A technician may be performing maintenance on local tandem
trunks or non-local tandem trunks included in the routes for the
call.
Issue 1
February 1998
Page 5-45