Operation Manual

21BusinessPhone – Cordless DT400/DT410/DT420/DT430
During Calls
Conference
You have a conversation and you want to establish a telephone
conference.
Q
Press
Dial tone.
z
Call the third party
Q3
Press to establish a three party conference
Now you have established a three party conference. To mark the
conference, all conference members will hear a periodical
conference tone.
Repeat the procedure to include other persons to the
conference
In this way, you can include up to six parties in a conversation. How
many of them can be external callers depends on the programming
of the system.
T
End the call to leave the conference
Mute ringer or warning
If the Cordless rings or a warning sounds at an inconvenient
moment, e.g. when the battery runs low, you will be warned by a
battery low sound (4 short beeps).
Press shortly to mute the ringing or warning for the moment
The Ringer off icon turns on to indicate that ringing is suppressed.
Note: When a warning occurs during a call and you want to
mute the microphone, the first press always mutes the
warning sound. The second press mutes the microphone.