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Glossary
Gigaset DE900 IP PRO / en / A31008-M2210-R101-3x-7619 / glossary.fm / 22.03.2011
Version 2, 27.05.2010
Call swap
Call swap allows you to switch between two callers or between a conference and an
individual caller without allowing the waiting caller to listen to the 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.
CD
Call divert
See Call divert.
Chatting
Form of communication on the Internet. During a chat, brief messages are exchanged
between the communicating parties in real time. Chatting in this sense is understood
to be a written form of communication.
Client
Application that requests a service from a server.
CLIP
Calling Line Identification Presentation
Telephony feature. The number of the caller is transferred to the called party's phone
display (if the caller activates this feature). The called party's phone must be compati-
ble with CLIP and the feature must be enabled on the phone port.
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 – digital data when
voice packets are received. There are different codecs, with differing degrees of com-
pression, 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 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 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.
