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elmeg DECT200 Multicell System
bintec elmeg Glossary
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 .