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Glossary
Gigaset N720 DECT IP Multicell System / engbt / A31008-M2314-L101-6-7619 / Glossary.fm / 29.08.2016
Version 2, 06.08.2010
Client
Application that requests a service from a server.
Cluster
Subdivision of a DECT network into groups (subnets) by a central management station
(DECT Manager). All telephones in the network use the central functions of the PABX
(VoIP configuration, directories, etc.). However, the base stations only synchronise
within a cluster, meaning that a handover of a handset from one cluster to a
neighbouring cluster is not possible.
If cells cannot synchronise wirelessly, they must be assigned to different clusters so
that synchronisation can take place within these clusters. This is required for problem-
free use of the DECT system.
Codec
Coder/decoder
Codec is a procedure that digitises 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
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 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/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 immediately, 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.
