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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Features and technical reference
1280Call Forwarding
20
If the Coverage of Calls Redirected Off-Net field on the System Parameters
Customer-Options screen and the Coverage of Calls Redirected Off-Net Enabled
field on the System Parameters - Call Coverage/Call Forwarding screen are both
set to
y, the system allows calls forwarded off-net to be monitored for busy or
no-answer conditions. The system may bring the call back for call-coverage
processing if the principal’s coverage criteria are satisfied at the forwarded-to
destination. However, if the principal does not have a coverage path, the system
does not monitor the call. It is left at the off-net destination regardless of whether
it is answered or busy.
Calls forwarding off net require an available outgoing trunk. Additionally, when
the Coverage of Calls Redirected Off-Net field is
y, a call-classifier port may be
required. If there are no call-classifier ports available when needed, the call still
routes off net, but it is not monitored for call progress tones and cannot be
returned to the switch for further call coverage processing.
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.