6/1553-DBC 446 01 Uen G 2012-02-22
32
O
UTGOING
C
ALLS
H.323 Phones
1)
Tap the
Callback
button and wait for a dial tone.
2)
Dial the complete external number, part of it or no number.
3)
Dial
#
. The callback indicator icon is highlighted.
4)
Replace the handset.
SIP Phones
1)
Press the numeric key
6
and wait for a dial tone.
2)
Dial the complete external number, part of it or no number.
3)
Dial
#
and tap the
Call
button. The callback indicator icon is high-
lighted.
4)
Replace the handset.
6.2.2.2 Answering
Callback
when all External Lines are Busy
(Available in H.323 phones only)
When you try to make a call and hear a congestion tone instead of a dial
tone, it means that all external lines are busy.
As soon as an external line becomes free, you will be called back. Then
lift the handset (or press the loudspeaker button to use the speaker-
phone). You have to answer within 8 seconds, otherwise the callback is
cancelled. When you answer, the external number you have called is
automatically transmitted, but you may have to dial any remaining digits.
6.2.3 Call
Waiting
If you urgently wish to contact a busy extension or external line, you can
send a notification using a
Call Waiting
signal. Call Waiting is indicated
either by a tone (if the busy extension is an analog extension), or as a
second call (if the busy extension is a digital system phone or an IP
phone).
Note:
If the called extension does not accept Call Waiting signals, you
will continue to hear a busy tone. If the busy extension ignores
the Call Waiting function key, you can order automatic Callback.
6.2.3.1
Activating Call Waiting
To send a call waiting signal to the busy number, do the following:
1.
Tap
CallWaiting
.
