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Glossary
S675IP / USA-CAN eng / A31008-xxxx-xxxx-x-xxxx / glossary.fm / 14.05.2009
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Call swap
Call swap allows you to switch between two callers or between a conference
call 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.
CF
Call forwarding
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.
Codec
Coder/decoder
Codec is a procedure that digitizes and compresses analog voice before it is
sent via the Internet, and decodes – i.e. translates into analog 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 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
Service characteristic of 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 dialed 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.
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 terminate the
connection to this participant immediately, then this was a consultation call. If
you switch between the first and second participant, it is called
.
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