Aastra Ascotel IntelliGate 2065 - Page 329

Ascotel IntelliGate 2025/2045/2065
Part 2 Call Routing 329
PARE Partial Rerouting
CD Call Deflection
P-P Point-to-point operation
P-MP Point-to-multipoint operation
Fig. 2.89: Transferring Call Forwarding Unconditional to the Exchange
Call Deflection
Call deflection (CD) is a supplementary service for ISDN subscribers 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-network
interface (see "Deflecting a call during the ringing phase (CD)", page 448).
Partial Rerouting
Partial rerouting (PARE) is a supplementary service for PBX operators and is avail-
able only on a point-to-point connection (basic and primary rate access).
Call Forwarding Procedure
Call Forwarding Unconditional is transferred to the exchange as follows (Fig.
2.89):
• Subscriber B activates a Call Forwarding Unconditional to subscriber C.
• Subscriber A calls subscriber B.
• The PBX carries out the Call Forwarding Unconditional locally in the PBX. Two
B channels are busy. 2 channels B are busy
haz1216aaenb0
PBX
A
C
A
C
B
CD
PARE
T
(P-MP)
T
ISDN
(P-P)