Administrator's Guide

Features and technical reference
555-233-5061614 Issue 5 October 2002
Whenever an incoming trunk call is redirected off-net, a timer is set that precludes
any other incoming trunk call from redirecting off-net until the timer either
expires or is cancelled. The rationale for this mechanism is to prevent calls that
were redirected off-net from being re-routed back to the original principal from
the off-net destination, effectively creating a round-robin loop that continuously
seizes trunks until they are exhausted. The blocked call receives busy tone or
redirects to coverage.
NOTE:
If you send calls off-net and use the Call Classifier - Detector or the
Tone-Clock (with Call Classifier-Tone Detector) circuit pack (the
international version) for call classification and do not use the American
tone plan, use the System-Parameters Country-Options screen to define
specific country tones. If you use the Call Classifier - Detector or the
Tone-Clock (with Call Classifier-Tone Detector) circuit pack (the
international version) and do not use the System-Parameters
Country-Options screen, your system will download the American tone plan
regardless of your geographical location.
Call Forwarding — Override
You can administer Call Forwarding Override on a system-wide basis to allow a
forwarded-to party to override Call Forwarding when placing a call to the
forwarded-from party. Call Forwarding Override is invoked automatically if the
system-wide override option is set.
Call Forwarding Override cannot be used when calls forward to an external
number. Call Forwarding All Calls from a data user or a hunt group cannot be
overridden with Call Forwarding Override.
Warning users if their calls are redirected
You can warn analog phone users if they have features active that may redirect
calls. For example, if the user has activated call forwarding, you can administer a
setting to play a special dial tone when the user goes off-hook. See
‘‘DISTINCTIVE AUDIBLE ALERTING’’ on page 826 for more information.
Security
Use the list call-forwarding command to get general information and to identify
unauthorized Call Forwarding feature activation. The list shows the station name,
station number, and forwarded-to destination number.
!
SECURITY ALERT:
Users who do not have permission to call out of the building may not do so
with Call Forwarding.