AT&T MERLIN LEGEND Release 4.0 Feature Reference page 160

Feature Reference
Call Waiting
Camp-On
Conference
Digital Data Calls
Direct Station
Selector
Display
160
Coverage
A call to a sender with Call Waiting turned on goes to Individual and/or
Group Coverage first. If all coverage points are busy, the sender
receives the call-waiting tone.
Coverage calls answered by any receiver can be camped-on to another
user.
Conference calls can be originated from a Cover button only when the
user with a caller on the Cover button presses the Transfer button, dials
the number for another person, and then presses the Conf button to
complete the transfer. In this case only, instead of the call being
transferred, a conference call with three participants (including the
originator) is established.
It is recommended not to use individual Coverage for 2B data calls.
Since a coverage receiver can only have one cover button per
coverage sender, covered 2B data calls are received only as 1B data
calls at the coverage receiver. The second call also continues to ring at
the coverage sender.
Secondary coverage delay does not apply to data calls. Calls ring
immediately.
Each desktop video system must have at least two group coverage
buttons for a coverage group to receive 2B Data video calls from a
coverage group. If there is only one Coverage button, covered 2B data
calls are received only as 1B data calls at the coverage receiver. The
second call also continues to ring at the coverage sender.
When a system operator transfers an Individual or Group Coverage call
and the call returns, the red LED next to the DSS button for the sender
does not flash as it does for a transfer return for calls received on other
types of line buttons.
When an Individual or Group Coverage call is answered by a receiver
with a display telephone,
the sender's name (if programmed) or extension number, and the
reason the call was sent to coverage:
telephone, other reasons why calls are sent to coverage are also
shown:
. The receiver sees the caller information by pressing the
More button.
is shown for the call type, followed by
, , or
or
. On an MLX