Aastra IntelliGate A150, Системное руководство

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System Functions and Features as of I7.9
Call routing 209
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5. 7. 3 Three-Party Connections in the Exchange
A locally implemented three-party connection with two external users takes up
two B channels.
In point-to-multipoint operation the system can be configured so that the node of
such a three-party connection is transferred from the PBX to the public network,
thereby freeing up at least one B channel and PBX resources. To do so the system
accesses the supplementary services of the network provider.
The users themselves are not aware of this process.
The following PBX features can be transferred to the exchange:
Tab. 71 Supplementary services take charge of features transferred to the exchange
Fig. 91 External connection followed by hold and enquiry calls
PBX feature Supplementary service Feature description
Hold Hold see page 349
Enquiry call Inquiry Call see page 350
Brokering Brokering see page 352
Call transfer (with or without prior notice) Explicit Call Transfer see page 359
Call back
(only after call transfer with prior notice) Recall see page 418
Three-party conference Three-Party Conference see page 354
ISDN ISDN
A
B
PBX
haz1217aaena0
ISDN ISDN
A
C
B
PBX
haz1218aaena0