8.4.16 Callback If Subscriber Busy / Free - ASCOM Ascotel 2025 System Manual

ascom Ascotel 2025/2045/2065

8.4.16 Callback if Subscriber busy / free

This feature is used to obtain an automatic callback if a subscriber is busy or if a
call to a subscriber who is signalled as free goes unanswered.
Callback if Subscriber busy
Subscriber A has the possibility of activating a callback to busy subscriber B (call-
back request). As soon as busy subscriber B becomes free, subscriber A will be
called back within 10 s. As soon as A picks up the phone, the system automatically
calls subscriber B, who is now free.
Fig. 2.198: Callback if subscriber busy
Detailed Description
Tab. 2.219: Callback if subscriber busy
Inter- Operating sequence / signalling on the terminal Scope
face
A Once the callback procedure has been exe-
cuted, A obtains the acknowledgement tone.
B
1)
Callback to busy external subscriber is possible only if the public network supports the service "Comple-
tion of Calls to Busy Subscriber" (CCBS) end-to-end.
2)
If the PISN subscriber is reached via the public network, the conditions of the public network for callback
when busy will apply.
The callback is triggered only to subscriber A, who set the callback, regardless of
whether a call diversion or call forwarding to a subscriber C has been activated at
A.
2.374 Features
A
haz0207aaxxa0
Restriction:
Subscriber A can only initiate one callback at a
time.
Possible interfaces:
internal, external
Restriction:
Only one callback at a time can be loaded onto
an external or PISN subscriber.
B
C
1) 2)
, PISN
HBT_20321104_02/B0_en