Information Technology Reference
In-Depth Information
Call Forward
There are several Call Forward options configurable in CUCM:
Call Forward All (CFA):
CFA causes all calls to be forwarded to the destination
number specified by the user or administrator, either at the phone itself or on the
CUCM user or administrative web pages, without ringing the original dialed number.
When CFA is enabled, the Call Forward Search Space is used and line/device search
spaces are ignored. For this reason, the Call Forward Search Spaces should be config-
ured to avoid call failures in a system that uses custom Partitions and Search Spaces.
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Note:
If the Voice Mail checkbox is selected, CUCM ignores the destination in the for-
ward setting and Calling Search Space fields and forwards the call to the Voice Mail Pilot
number specified in the configured Voice Mail Profile.
Shared Lines
If two (or more) IP Phones have the same DN configured on one of their lines, calling the
DN causes both phones to ring. The first phone to be picked up takes the call; the second
phone cannot also pick up the call without invoking the Barge feature (if configured). If
the first phone places the call on hold, the second phone can pick up the held call.
Barge and Privacy
If two phones have a shared line configured and one of the phones is using that line, the
second phone can force a three-way conference with the first phone by using the Barge
feature. The conference is hosted on the first phone's built-in conference bridge. (For IP
Phone models not supporting a built-in bridge, an external conference bridge can be con-
figured.) When the second phone barges in on the call, all parties hear a beep (by default).
If the barge fails (typically because of a lack of conference resources), the barging phone
displays an error message.
A Privacy softkey can be configured that, when enabled, prevents barging into a call in
progress. Both the Barge and Privacy capabilities can be enabled and disabled both clus-
ter-wide and at the individual phone configuration pages.
Call Pickup
A DN can be made a member of a Call Pickup Group, which is simply a numbered assign-
ment. Three types of Call Pickup can be configured using these Pickup Group assignments:
Call Pickup:
If multiple DNs have the same group number and one of them is ring-
ing, another phone with a DN in the same pickup group can invoke the Call Pickup
softkey and the call is immediately extended to that phone instead.
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Group Call Pickup:
If two phones have DNs in different Call Pickup Groups and
one of them is ringing, the other phone can invoke the GPickup (Group Call Pickup)
softkey, dial the group number of the ringing DN, and the call is immediately ex-
tended to that phone instead. A variant of this feature called
Directed Call Pickup
al-
lows a user to enter a specific DN that is ringing to pick up that specific call, rather
than the first call that started ringing in the group.
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