Operation Manual

Extension features
8
Extension features
The following list describes the features provided for the different extensions.
Note: Many of the features are displayed on ISDN terminals and can be enabled
directly via speed dialling keys. Because of the huge diversity of terminals
available on the market, operating instructions cannot be provided here. Please
consult the User's Manuals of the appropriate terminals.
Call forwarding
Call forwarding is executed within the telephone system and can be configured
individually for each extension. It is possible to forward calls to internal and external
calling destinations.
There are three authorisation levels for enabling call forwarding:
no call forwarding permitted
call forwarding permitted only to internal destinations
call forwarding permitted to internal and external destinations
The following examples assume that the call forwarding is set up on one’s own
telephone in all cases.
Call Forwarding Unconditional (CFU)
Incoming calls are immediately routed to the programmed destination phone
number. Your own terminal does not display a notification for the call. This setting is
recommended for business trips, holidays, etc.
Call Forwarding on Busy (CFB)
Incoming calls are forwarded to another terminal if your own extension is busy.
Note: In order for the CFB feature to work properly, it is absolutely essential to
disable the "call waiting" feature at the appropriate terminal device(s).
Call Forwarding No Reply (CFNR)
Incoming calls are first signalled on your own terminal. If the call is not answered
during this time, it will be forwarded to the call forwarding destination.