-15-
Short User Guide
Conference
Analogue and ISDN Phones
ST 40
ST 21/ST 31
Three Party Conference
Call (Intern / Extern)
A
z
A
K
You are on a call. (Ex-
ternal or Internal)
Press „Enquiry“
button, Enter extension
number or seize trunk
line with „0“ (or 9) and
dial required telephone
number.
Talk to newly esta-
blished call
Press the programmed
soft key „Conference“.
Participants will hear
a confi rmation tone.
Conference is esta-
blished.
A
%
z
A
y&
K
A
r
Z
A
rS61
Q
K
You are on a call. (Ex-
ternal or Internal)
Press „Enquiry“
button, Enter extension
number or seize trunk
line with „0“ (or 9) and
dial required telephone
number.
Talk to newly esta-
blished call
Using the arrow
buttons select „Con-
ference“ and confi rm
by pressing „OK“.
Participants will hear
a confi rmation tone.
Conference is esta-
blished.
You are on a call. (Ex-
ternal or Internal)
Recall, enter extension
number or „
0
“ and
external number re-
quired.
Talk to newly esta-
blished call
Press Recall and dial
feature number
Confi rmation tone.
Conduct conference
call with two extensi-
ons - and one trunk
call.
Conference Calls within the Telephone System
The following types of conference calls my be conducted:
- a three party conference with analogue extensions or extensions of an S0-connection, or
- a three party conference with an external - an internal call, or
- a three party conference with two external calls. You will need two trunk lines for this.
Conference calls via the ISDN telephone exchange will only be possible via a „Point to Multi Point“ line.
To establish an ISDN three party conference with two external lines you must fi rst hold the fi rst external call in the ISDN exchange and establish
a second call via an enquiry call on the same trunk line, after which you establish a three party conference with the two external trunk calls.
