Gigaset A510IP User Manual page 168

Glossary
CF
Call Forwarding
See Call divert.
Client
Application that requests a service from a server.
Codec
Coder/decoder
Codec is a procedure that digitises and compresses analogue voice before it is sent via the Inter-
net, and decodes – i.e., translates into analogue voice – digital data when voice packets are
received. There are different codecs with differing 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 recipient when establishing a con-
nection.
The choice of codec is a compromise between voice quality, transmission speed and the neces-
sary 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/ISDN connection for outgoing calls.
COLP displays the phone number accepting the call on the calling party's display unit.
The number of the party accepting the call is different to the dialled number, e.g., if the call is
diverted or transferred.
The called party can use COLR (Connected Line Identification Restriction) to prevent the
number from appearing on the calling party's display.
Consultation call
You are on a call. With a consultation call, you interrupt the conversation briefly to establish a
second connection to another participant. If you end the connection to this participant imme-
diately, then this was a consultation call. If you switch between the first and second participant,
it is called Call swapping.
CW
Call Waiting
See Call waiting.
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