AASTRA DT4x2 for MX-ONE User Guide EN - Manual (Page 60)

During Calls
DT412/DT422/DT432 60
Conference
With this procedure you can include up to seven parties in a
conference. Only the conference leader (i.e. the person initiating the
conference) can admit participants. During the conference a tone
will be heard every 15 seconds.
Note: The conference tone might be disabled for your
system.
You have an ongoing conversation and want to establish a
telephone conference. You will become the conference leader.
R
Press (see display).
Dial tone. å
Call the third party.
Wait for answer. 3
Press to establish a conference.
Repeat the procedure to add more conference members. æ
End the call to leave the conference.
Note: A tone burst is heard each time a participant enters
or leaves the conference. When the conference leader
leaves the conference, the conference will continue with the
other included parties. The conversation is changed back to
a normal two party connection when there is only two
parties left.
Answer a conference call
A conference call is indicated by a different signal compared to
normal calls and a text message. The conference call must be
answered within a pre-set time (default 30 seconds). A normal call
in progress has higher priority, but if the normal call is ended before
the pre-set time, the conference call indication starts and the call
can be answered. æ
Press to answer the conference call.
You are connected to the conference.
Note: Conference call is not supported by IP DECT.