Features
369
System functions and features as of R4.1
syd-0570/1.2 – R4.1 – 08.2016
9. 5. 6. 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 connected with
A.
Fig. 205 Call transfer if busy
Detailed Description
Tab. 179 Call transfer if busy
If user B signals call waiting to C and then goes on hook, the call with A is transferred.
This applies only if C does not reject B’s call. For the full scope of this feature see "Call
waiting", page 388.
If the call is not answered by C within the configured recall time (C still busy or does not
answer), B again obtains ringing (see "Recall", page 371
).
If user B intrudes on C’s call and then goes on-hook, the call with A is also transferred.
This applies only if C neither rejects nor answers B’s call. For the full scope of this fea-
ture, see "Intrusion", page 390
.
End point Operating sequence / signalling on terminal 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 224
).
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 224
).
B • After the enquiry call to C, B obtains a busy tone.
• After recall has been activated B obtains an acknowl-
edgement tone.
• On the operator phone the line is signalled as
switched until user C answers the call or a recall takes
place.
Not possible for SIP and Mitel SIP phones
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.
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