System Functions and Features as of I7.9
206 Call routing
syd-0200/3.0 – I7.9 – 11.2009
5. 7. 2 Transferring Call Forwarding Unconditional to the
Exchange
Internal users can divert their terminal to external destinations. When an external
user calls the destination diverted externally, the exchange-to-exchange connec-
tion created occupies two B channels.
The system can be configured so that such call forwarding are transferred from the
PBX to the public network, thus freeing the two B channels. To do so, the system
automatically activates the supplementary services partial rerouting (in point-to-
point operation) and call deflection (in point-to-multipoint operation).
The users themselves are not aware of this process.
The called user in the public network is presented with the caller’s CLIP as well as
information on who redirected the call.
PARE Partial Rerouting
CD Call Deflection
P-P Point-to-point operation
P-MP Point-to-multipoint operation
Fig. 90 Transferring Call Forwarding Unconditional to the Exchange
Call Deflection
Call Deflection (CD) is a supplementary service for ISDN users and is available only
on a point-to-multipoint connection. Call deflection can be used to reroute a call
during the ringing phase. The feature is also provided at the user interface (see "De-
flecting a call during the ringing phase (CD)", page 335).
haz1216aaenb0
PBX
A
C
A
C
B
CD
PARE
T
(P-MP)
T
ISDN
(P-P)
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