System Functions and Features as of I7.9
Call routing
153
sy
d-
020
0/3.
0
– I7.
9
– 1
1
.2009
Call waiting not allowed or not possible
If no alternative destinations have been configured, the following rules apply:
•
In the case of an incoming call from the public ISDN network the caller obtains
the busy tone.
If the caller has subscribed to the service
Automatic callback (CCBS)
with the net-
work provider, he can activate that service.
•
In the case of an incoming call from the private leased-line network the caller
obtains the busy tone.
•
In the case of an incoming call from the public analogue network the caller waits
until the called party is free (polling).
Fig. 66
Call distribution if user is busy
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