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ISDN glossary
A
Added-feature connection
ISDN connection that offers three more services than the standard connection: Call
forwarding, transfer of charges after the connection, and a T-mailbox.
AOC-D
Advice of Charge: During the Call. Transfers the charge information during the con-
nection.
AOC-E
Advice of Charge: at the End of the Call. Transfers the charge information at the end
of the connection.
Authorisation class
Defines which connections are permitted on a PABX terminal, e. g., internal only,
incoming only, or unlimited call authorisation.
Authorisation for direct outward dialling
Different users may be assigned different levels of authorisation on a base station.
For example, while User A may only take incoming calls, User B may make calls with-
out restriction.
Automatic callback
See "Callback when the number is busy"
Automatic redial
Several attempts to call are made automatically when the line is busy.
B
Block dialling
Also pre-dialling. You may only dial or, if required, correct the phone number. Then
you should lift the receiver or press the loudspeaker key.
C
Call divert
CF, Call forwarding. You want to forward calls to another number permanently. You
can divert calls externally via the exchange or internally in the device itself. Call
divert can be set up individually for each separate phone number (MSN) (to your
mobile phone when on holiday, to the office, to a neighbour etc.).
This is carried out at the network provider's local exchange. This means the call
never reaches the original destination.
There are three kinds of call divert: immediate (CFU, Call Forwarding Unconditional),
when the line is busy (CFB, Call Forwarding Busy), and when the call is not answered
(CFNR, Call Forwarding No Reply).
ISDN glossary
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