Aastra 400 Series, System Manual, Page: 412 / 592

Features
412 System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
9. 5. 7. 3 Call transfer if busy
A user B can hand over a call with user A to the busy user C after making an enquiry
call to C by activating a recall and then hanging up. As soon as the busy user C is
free again, C's phone automatically begins to ring. When C answers, he is con-
nected with A.
Fig. 199 Call transfer if busy
Detailed Description
Tab. 204 Call transfer if busy
If user B signals call waiting to C and then goes on hook, the call with A is trans-
ferred. This applies only if C does not reject B’s call. For the full scope of this feature
see
"Call waiting", page 438 .
Interface
Operating sequence / signalling on the termi-
nal
Scope
A If A is on hold, he hears Music on hold Possible interfaces:
internal, external
1)
, PISN
2)
1)
If both A and C are external users, the settings authorising exchange-to-exchange traffic will need to be ob-
served (see
"Exchange-to-Exchange Connections", page 241 ).
2)
The settings authorising exchange-to-exchange traffic need to be observed for PISN users in the public net-
work or on a virtually networked PINX (see
"Exchange-to-Exchange Connections", page 241 ).
B • After the enquiry call to C, B obtains a busy
tone.
• After recall has been activated B obtains an
acknowledgement tone.
• On the operator console the line is signalled as
switched until user C answers the call or a recall
takes place.
C Possible interfaces:
internal, external
1)3)
, PISN
2)3)
3)
For users in the public network or reached via the public network, the feature Callback if busy (CCBS) must
be supported end-to-end by the public network.