AT&T MERLIN LEGEND Release 4.0 Feature Reference page 157

Feature Reference
When both the QCC queue and multiline telephones are programmed as
receivers for a coverage group, the QCC queue is not counted in the 8-receiver
maximum for the group.
A QCC cannot be a coverage sender.
When Group Coverage is the only type of coverage programmed for a sender,
the QCC queue should not be programmed along with Group Cover buttons on
multiline telephones. Because the QCC cannot be programmed for Delay Ring,
eligible calls ring immediately both at the sender's telephone and at the QCC
queue. This may not allow the sender enough time to answer the call before a
QCC operator answers.
If a call is sent to coverage because the sender did not have a button available
to take the call, the call does not return to the sender's telephone, even if a
button becomes available while the call is ringing at a coverage receiver's
telephone.
An inside voice-announced call made on an SA Voice or ICOM Voice is not
covered. If it is converted to a ringing call—for example, because the sender's
speakerphone is in use—the ringing call is sent to coverage.
No type of Cover button can be used to make calls.
When the sender also has Individual Coverage and an Individual Coverage
receiver is available, the Delay Ring interval is used as an additional delay (in
addition to the coverage delay interval) before a call goes to Group Coverage.
When no principal user is assigned for a personal line, calls received on the
personal line cannot be forwarded to outside telephone numbers. Calls follow
the Individual Coverage patterns of all senders who share the line and the
Group Coverage pattern of the extension with the lowest logical identification
number (lowest numbered jack on the module).
Telephone Differences
Direct-Line Consoles
A DLC can be both an Individual or Group Coverage receiver and a member of
a coverage group.
157
Coverage