Siemens Gigaset A580 IP User Manual page 179

Glossary
C
CF
Call Forwarding (Call Diversion)
£
Call forwarding (Call
Call waiting
= CW.
VoIP provider feature. A beep during a call indicates that another caller is wait-
ing. You can accept or reject the second call. You can activate/deactivate the
feature.
Call forwarding (Call Diversion)
CF
Automatic forwarding (CF) of a call to a different telephone number. There are
three kinds of call forwarding:
u
CFU, Call Forwarding Unconditional
u
CFB, Call Forwarding Busy
u
CFNR, Call Forwarding No Reply
Form of communication on the Internet. During a chat, brief messages are
Chatting
exchanged between the communicating parties in real time. Chatting in this
sense is understood to be a written form of communication.
Application that requests a service from a server.
Client
Codec
Coder/decoder
Codec is a procedure that digitalises and compresses analogue voice before it
is sent via the Internet, and decodes – i.e. translates into analogue voice – dig-
ital data when voice packets are received. There are different codecs, with dif-
fering degrees of compression, for instance.
Both parties involved in the telephone connection (caller/sender and recipient)
must use the same codec. This is negotiated between the sender and the recip-
ient when establishing a connection.
The choice of codec is a compromise between voice quality, transmission speed
and the necessary bandwidth. A high level of compression, for example, means
that the bandwidth required for each voice connection is low. However, it also
means that the time needed to compress/decompress the data is greater, which
increases execution time for data in the network and thus impairs voice quality.
The time required increases the delay between the sender speaking and the
recipient hearing what has been said.
COLP/COLR
Connected Line Identification Presentation/Restriction
Feature provided by a VoIP connection for outgoing calls.
COLP displays the phone number accepting the call on the calling party's dis-
play unit.
The number of the party accepting the call is different to the dialled number,
e.g. if the call is forwarded or transferred.
The called party can use COLR (Connected Line Identification Restriction) to
prevent the number from appearing on the calling party's display.
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Diversion).