Mitel 430 - Page 235

Call routing
235
System functions and features as of R4.1
syd-0570/1.2 – R4.1 – 08.2016
Fig. 113 External connection followed by hold and enquiry calls
Description of the Procedure
Calls on hold in the exchange (Fig. 113
):
• User is through to user B.
• User B puts user A on hold: The call is put on hold locally in the communication
server.
• User B calls user C: As soon as user B dials the external phone number; the com-
munication server transfers the locally held call to the exchange by activating the
Hold supplementary service with the network provider.
All the other three-party connections can be set up from this situation. Example with
brokering:
• User A is on hold in the exchange
• User B is through to user C.
• User B brokers to user A:
As user A in the exchange is on hold, the communication server itself does not bro-
ker; instead it requests the network provider to do so (by sending "hold" for user B
and "retrieve" for user A).
Fig. 114 Brokering followed by call transfer
B
A
B
C
A
ISDNISDN
Communication
server
Communication
server
ISDNISDN
B
C
A
B
C
A
Communication
server
Communication
server
ISDNISDN
ISDNISDN