AASTRA 4225 for MX-ONE Telephony Switch - Manual (Page 55)

55 Dialog 4223 Professional/Dialog 4225 Vision
During Calls
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 (Line 1) and want to establish a
phone conference. You will become the conference leader.
Conf/Transf Press (see display).
Note: You can also press Line 2 or Inquiry.
z
Call the third party.
Wait for answer.
Conference Press to establish a conference (see display).
Note: You can also press
3
or Conference (The function key is
programmed by you).
Repeat the procedure to add more conference members.
d
Replace the handset to leave the conference.
Note: A tone 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 are only two parties left.