AT&T MERLIN LEGEND Release 4.0 Feature Reference page 264

Feature Reference
Individual calling group member extensions are assigned an extension number,
allowing a group member to receive calls as an individual and as a group
member. Calls that come into a calling group are usually not intended for a
particular group member and can be handled by any member. However, inside
callers can reach a specific calling group member by dialing the individual
extension number assigned to the member.
As calls come into the calling group, the system hunts for an available group
member in a circular or linear manner (See "Hunt Type" in this section). If a
group member is available, the call rings on an SA or ICOM button. If all group
members are busy or otherwise unavailable, calls are held in a queue. As
calling group members become available, the calls are distributed on a first-in,
first-out basis.
When all calling group members are busy, inside callers who are transferred to
the calling group hear regular ringback and the call is sent to the calling group
queue; outside callers hear special ringback or Music On Hold if it is
programmed for the system. In addition, an announcement device can be
assigned to the group to play a recorded announcement to each waiting caller,
in the order that the calls arrive in the queue.
Calling group members log in when they are ready to take calls (called available
status ) and log out while they finish call-related activities or when they leave
their positions (called unavailable status ). Calls are sent to a calling group
member only if the member is logged in and is not busy on another call. When
the group type is set to Auto Logout (the factory setting) and a call sent to a
calling group member is not answered within 30 seconds (5 rings), the call is
sent to another member or to the front of the queue if another calling group
member is not available. The system automatically logs out the extension where
the call went unanswered and makes it unavailable for subsequent calls until
the calling group member logs in.
A calling group member is considered available if all of the following conditions
are met:
The extension is signed in to the calling group (available status).
The extension handset is on-hook and a red light is on next to the next
line button to be used by Automatic Line Selection, or a headset user has
disconnected the last call no red light is on at any line buttons, and the
speakerphone is off.
The extension is not ringing or busy on another call.
The extension does not have a call on hold (except for a call awaiting
transfer).
The extension is not in programming or test mode.
An SA or ICOM button is available for call delivery.
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Group Calling