AT&T MERLIN LEGEND Release 4.0 Feature Reference page 162

Feature Reference
Group Calling
Hold
Multi-Function
Module
Park
Personal Lines
162
Coverage
A calling group can be a receiver for up to 30 coverage groups. A
calling group cannot be a receiver for Individual Coverage. A coverage
group can have only one calling group as a receiver, but members of
the coverage group can also have Individual Coverage receivers.
As soon as a Group Coverage call is sent from the calling group queue
to a calling group member, ring and LED flashing are removed from the
sender's telephone (except for outside calls received on personal lines).
A calling group cannot be a sender, but an individual calling group
member can be a sender for Individual Coverage and/or a member of a
coverage group. When a call to the calling group extension number is
sent from the queue to the calling group member, it goes only to the
member's Individual Coverage receivers and not to the member's
Group Coverage receivers. Calls to the member's individual extension
go to both Individual and Group Coverage receivers.
Coverage calls answered by any type of receiver can be put on hold.
The Hold Timer or Operator Hold Timer applies to a coverage call on
hold.
A Multi-Function Module (MFM) can be a sender or a receiver for
Individual or Group Coverage. This allows the associated MLX
telephone user to screen calls by using an answering machine
connected to the MFM or to supplement ringing with an external alert
connected to the MFM. A sender can use Coverage Off to prevent calls
from being sent to an answering machine.
A returning parked call is not eligible for coverage. A call answered on
a Primary Cover, Secondary Cover, or Group Cover button cannot be
parked on that button. To park calls received on a Cover button at your
extension, press the Transfer button, dial your own extension, and
press the Transfer button again to complete parking the call.
When a principal user is assigned a personal line, calls arriving on the
personal line follow that user's coverage pattern, if any. Calls received
on personal line buttons on senders' telephones other than the principal
user's do not go to coverage.
If no principal user is assigned, calls received on the personal line are
sent to all available Individual Coverage receivers for all senders
sharing the line and to the Group Coverage receivers programmed for
the sender whose telephone is connected to the lowest jack in the
lowest-numbered slot in the control unit.
In Release 2.1 and later, calls received on personal lines with Do Not
Disturb on will go immediately to coverage instead of waiting for the
coverage delay interval.