AT&T MERLIN LEGEND Release 4.0 Feature Reference page 277

Feature Reference
Messaging
Multi-Function
Module
Music On Hold
Night Service
Park
Personal Lines
Pickup
Pools
Remote Access
Users can leave messages for the calling group only if the system has
been programmed with a designated calling group message-waiting
receiver. The receiver also receives fax message-waiting indications
directed to the calling group. The message-waiting receiver cannot
distinguish between messages left for the calling group and fax or
personal messages.
A Multi-Function Module can be a member of a calling group, can be
assigned as a delay announcement for a calling group, or can be used
to connect an external alert for a Calls-In-Queue Alarm. An MFM that is
used for the delay announcement or Calls-in-Queue Alert should not be
assigned as a group member.
An outside caller waiting in the calling group queue hears Music On
Hold, if programmed.
In Release 2.0 and later, a calling group can be a Night Service group
member.
A calling group member who parks a call is considered available to
receive another call.
To allow all calling group members' telephones to ring when an outside
call is not answered within three rings, the trunks programmed to ring
into the queue can also be assigned to buttons on group member
telephones and programmed for Delay Ring. This Delay Ring technique
does not work for inside calls, remote access calls, or DID calls, or
when a delay announcement device is assigned to the group.
If a person with a shared personal line button answers a call waiting in
the calling group queue, the call is removed from the queue. If a delay
announcement is playing, it is disconnected from the call.
A calling group member can be a member of a Pickup group. Calling
group members can use Pickup to answer a call (either to the calling
group or to the individual group member's extension) ringing at another
group member's telephone. Line Pickup can be used to pick up a call in
the calling group queue.
Trunks assigned to pools can be assigned to ring into a calling group.
An incoming call on a trunk assigned to the pool rings on an SA button,
even if the calling group member has a Pool button assigned.
Remote access users cannot log into a calling group, but a remote
access user can call into a calling group regardless of the restrictions
applied. When the call rings at a calling group member's telephone, it
rings as an outside call. A calling group can be programmed to receive
calls from remote access users to invalid extensions. If a trunk is
programmed for both Remote Access and Group Calling, Remote
Access overrides Group Calling.
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Group Calling