AT&T MERLIN LEGEND Release 4.0 Feature Reference page 130

Feature Reference
If the system is not in Hybrid/PBX mode or the user has no available SA
button, the prompt
MLX display telephone.
After the system selects an SA button or the originator selects a line, Line 2
displays the prompt
line. Line 1 shows call-handling information, such as dialed digits, while Line 2
is unchanged. The originator should then press Conf to connect all parties. The
prompt on Line 2 is replaced by the date and time. Line 1 displays the number
of parties in the conference.
If the conference originator presses the Conf button, selects a line button, dials
a number, and presses the Conf button again before the person being called
answers, all conference participants hear ringback, which may cause voices to
cut in and out.
If the conference originator calls a co-worker and presses the Conf button, and
the co-worker while on hold for the conference presses a Hold, Conf, or
Transfer button, the call is disconnected.
If a conference participant (excluding the originator) who is included on a
conference call on an SA or ICOM button leaves the conference temporarily by
putting the call on hold and then rejoins the conference on a shared personal
line or Shared SA button, the person is connected to the conference. However,
the LED for the original conference call line on the SA or ICOM button turns off.
In Release 2.1 and later, a call on hold at a programmed Cover button can be
added to a conference by an originator with a personal line for the call.
Mode Differences
Behind Switch Mode
The fixed Conf button on multiline telephones activates conference from the
host system. The dial codes for the host system for conference and drop must
be system-programmed. A multiline telephone user can program a Conference
or Drop button to use the communications system's Conference or Drop
features as described above.
A single-line telephone user cannot use the Conference feature in Behind
Switch mode.
130
Conference
appears on Line 2 of the display on an
. The originator can dial a number or select another