AT&T MERLIN LEGEND Release 4.0 Feature Reference page 275

Feature Reference
Camp-On
Conference
Coverage
Digital Data Calls
Users can transfer calls to a calling group by using Camp-On, but calls
do not return to the originating extension, even if it is not answered
within the programmed camp-on interval. If the calling group is made
up of fax machines, a call-waiting tone is not given to the fax jack when
the call is camped-on.
Calls waiting in the calling group queue or ringing at a calling group
member's extension cannot be added to a conference call. A user must
be connected to a calling group member before the call can be added
to the conference.
A calling group cannot be programmed as a receiver for Individual
Coverage. A coverage group can have a maximum of one calling group
as a receiver. If a calling group is programmed as a receiver for a
coverage group, it must be the only Group Coverage receiver.
However, Individual Coverage (primary and/or secondary) receivers
can be programmed. A calling group can be a receiver for a maximum
of 30 coverage groups.
As soon as the call is sent from the calling group queue to a calling
group member or the delay announcement, the ringing and lit LED is
removed from the sender's extension (except for an outside call
received on a personal line).
Coverage VMS Off can be activated if the user does not want outside
calls to be sent to the voice messaging system.
A calling group cannot be a sender. A calling group member can be a
sender for Individual Coverage (Primary or Secondary) or Group
Coverage. Calls to the calling group extension number are sent only to
the calling group member's Individual Coverage receivers and not to
the Group Coverage receivers. Calls to the calling group member's
individual extension are sent to both Individual and Group Coverage
receivers.
Lines intended for data calls should not be mixed in the same Calling
Group with lines intended for voice calls.
Desktop video systems can only connect using 1B Data connections
when receiving a call through a Calling Group, since a Calling Group
only dispenses one call to each Calling Group member.
275
Group Calling