MERLIN LEGEND Communications System Release 6.1
Feature Reference
555-661-110
Issue 1
August 1998
Features
Page 107Callback
Digital Data Calls Videoconferencing systems that can dial feature codes using # can use
Selective Callback. When a pooled line becomes available or the busy
video system is idle, the queued call is made, one B-channel at a time.
When the second B-channel becomes available, it can be used for the
connection as well, providing the video system supports this capability.
Although video systems can use either off-hook or on-hook Callback, you
should use only off-hook Callback for 2B data connections. If you use
on-hook Callback, the returning callback call is connected using only one
B-channel.
Automatic Callback should be disabled for digital data and
videoconferencing extensions. It can be used at an MLX passive-bus
extension at a desktop video workstation.
Display When a call is queued by Automatic Callback on a multiline telephone or
by Selective Callback on an analog multiline telephone, the display shows
a feedback message. When an MLX telephone user activates Selective
Callback, the display prompts the user to enter the telephone number.
When the queued call rings the user’s telephone, the display indicates
that it is a returning callback call.
Do Not Disturb Calls to extensions that are using Do Not Disturb are not eligible for
callback queuing. If a callback originator is using Do Not Disturb, the
system overrides the feature and the telephone rings when the busy
extension or line/trunk is available.
Extension Status In Hotel mode, an extension in Extension Status 1 or 2 cannot use
Callback to request busy pools.
Forward and
Follow Me
If a user queues a call and then uses Forward, Remote Call Forwarding,
or Follow Me, the call does not ring back at the forwarded-to extension or
telephone number; the Callback call returns only to the forwarding
telephone. In Release 6.0 and later systems, Callback is not needed for
Centrex Transfer via Remote Call Forwarding calls, because the same
Centrex line that carried the original call is used to forward the call to the
outside number.
If an inside caller using Automatic Callback calls an extension with
Remote Call Forwarding on and no pools are available, the caller hears
queuing tone, but the call queues for the extension only, not for the
remote number. When the extension becomes available, dequeuing tone
sounds and the call is placed to the extension (not the Remote Call
Forwarding number) if the user has stayed on the line. If the caller has
hung up, priority ring is heard as the callback call is dispensed to the
caller.
In a case where no pools are available and an inside caller is not using
Automatic Callback, a call to an extension with Remote Call Forwarding
follows the extension’s coverage path. If there is no coverage and the
inside caller activates Selective Callback while listening to the busy
signal, the call queues for the extension but not for the Remote Call
Forward number.
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