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the DECT radio in the IP master not be used).
CDR
The term CDR (
C
all
D
etail
R
ecord) is used in relation to the recording of all
connections in a database. The recorded data is available for subsequent
activities, such as the calculation of connection charges or the network
analysis. CDR files are used in fixed networks, in IP networks in relation to
IP telephony and also in mobile networks. In selected virtual connections,
CDRs contain the call number, the name of the remote communication
computer, the date and time, the connection duration and the error
messages.
CFB
With the ISDN feature CFB (
C
all
F
orwarding
B
usy), an incoming call is
forwarded to a particular extension when the line is busy.
CFNR
With the ISDN feature CFNR (
C
all
F
orwarding
N
o
R
esponse), an incoming
call is forwarded to a particular extension if the call is not accepted after a
configured time.
CFU
With the ISDN feature CFU (
C
all
F
orwarding
U
nconditional), an incoming
call is forwarded to a particular extension immediately.
CHI
An information element in GSM networks that specifies the channel to be
used on the user network interface.
CR
Because, with ISDN, a terminal can control several connections
simultaneously, the individual connections are uniquely identifiable through
the connection identifier. Each connection therefore uses its own CR (
C
all
R
eference). For outbound connections, it is allocated by the terminal, for
inbound connections by the network.
CTI
CTI (
C
omputer
T
elephony
I
ntegration) is a value-added service for raising
efficiency in voice transmission. With this service, very simple applications,
such as computer-aided call number dialling, through to complete call
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