set up automatically. However, Callback must first be activated by
the caller on his or her terminal.
You call a subscriber, who does not pick up. With "Callback on no
reply", this is not a problem for you, because with this special fea-
ture, you can set up the connection without having to redial. If you
are not on the telephone yourself, a new connection with the sub-
scriber is set up - for a maximum of 180 minutes.
Number of the terminal called.
Special-feature telephones such as the T-Concept PX722 system
telephone enable call requests to be stored during absence.
Number of the calling terminal.
Common ISDN Application Programming Interface
A 128-bit encryption algorithm with similar functionality to DES. See
Block Cipher Modes.
Cipher Block Chaining
Consultative Committee for International Telegraphy and Telephony
The forwarding of calls. This performance feature enables you to
forward a call without having to take it yourself. If you forward a call
to an external subscriber, you bear any connection costs from your
connection to the destination of the forwarded call. This feature can
therefore be used by system telephones and ISDN telephones that
support this function (see user's guide for terminals). For more in-
formation on using this performance feature with the telephone,
please see the user's guide.
Performance feature of a PBX. Telephone numbers are stored in a
PBX and can be called from every connected telephone using a key
combination.
Certificate
Channel bundling
Challenge Handshake Authentication Protocol
Frame Check Sequence (FCS)
Calling Line Identification
Glossary
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