Telephoning
Page 12
2004 by TELES AG Berlin, Version 2.0/iPBX8TRe/6.02, Issue: May 1998
4.2.3 Callback on Busy
The callback on busy function can be activated when the party you are just call-
ing is busy. As soon as the called party is free again, you will receive a signal
from the local exchange – your telephone rings. You only need to lift the re-
ceiver then and the connection to the called party is established.
Note:
Your ISDN line and the remote party have to be able to support
the
Callback on busy
supplementary service.
Initiate a callback on busy:
Υ
Lift the receiver and hear the dial tone.
Ν
Dial a party in the public net. It is busy.
∗
Press the star key.
8
Enter the digit 8.
#
Press the pound key.
Θ
Instead of the busy signal, you now hear the confirmation tone.
∆
Put the receiver down. Wait till ...
Α
... you hear the ring tone for callback on busy. Now the remote
party is free. Your telephone rings for about 20 seconds.
Υ
Lift the receiver. If the remote party is free, you hear the ring
tone until the called party answers. Should they be busy again in
the meantime, callback on busy will remain active.
Deactivate callback on busy for current port
Υ
Lift the receiver and hear the dial tone.
∗
Press the star key.
862
Enter the digits 862.
#
Press the pound key. Listen for the confirmation tone. All call-
backs on busy set for the port are deleted.
Deactivate callback on busy for whole ISDN line
Υ
Lift the receiver and hear the dial tone.
∗
Press the star key.
861
Enter the digits 861.
#
Press the pound key. Listen for the confirmation tone. All call-
backs when busy are deleted – no matter for which telephone it
was activated.