4.1.2.4 Call Forwarding (CF)—by ISDN (P-MP)
Description
An extension user can forward the incoming ISDN call to another outside party using the ISDN service of the
telephone company, instead of the PBX feature, when the call is received through an ISDN line.
Extension users can set the forward destination to the network on an MSN basis. The setting must have been
done beforehand to use this feature. There are the following types:
Type Description
Call
Forwarding—Unconditional
(CFU)
Incoming calls are forwarded unconditionally.
Call Forwarding—Busy (CFB) An incoming call is forwarded when the destination in the PBX is
busy.
Call Forwarding—No Reply
(CFNR)
An incoming call is forwarded when the destination in the PBX does
not answer within a preprogrammed time period.
When the CFB or CFNR has been set, the network determines to forward the incoming call to the
preprogrammed destination after the call reached the PBX once. When the CFU has been set, the network
forwards the call directly to the preprogrammed destination.
[Example]
MSN: 123-4567
987-6543
Outside Party
(01-23-4567)
Outside Party
Outside Caller
Extn. 1011
Dials "123-4567".
(MSN: 123-4567
Forward Destination
of Trunk Calls: 01-23-4567)
(01-23-4567)
ISDN
<FWD> <Call Forwarding (CF) by ISDN (P-MP)>
PBX
Outside Caller
Extn. 1011
Dials "123-4567".
ISDN
MSN:123-4567
CFU
Destination: 01-23-4567
PBX
Conditions
• This feature complies with the following European Telecommunication Standard
(ETS) specification:
– ETS 300 207 Diversion supplementary service.
390 Feature Guide
4.1.2 Integrated Services Digital Network (ISDN) Service Features
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