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Glossary
Gigaset C470-C475 IP / GBR / A31008-M1916-L101-1-7619 / glossary.fm / 7.2.08
Version 2.1, 08.01.2007
R
RAM
Random Access Memory
Memory in which you have reading and storage rights. Items such as melodies and
screen pictures are saved in the RAM after you have loaded them onto the phone via the
Web configurator.
Registrar
The registrar manages the Network subscribers current IP addresses. When you regis-
ter with your VoIP provider, your current IP address is saved on the registrar. This means
you can also be reached when on the move.
Ringback when the call is not answered
= CCNR (Completion of Calls on No Reply). If a participant does not respond when called,
a caller can arrange an automatic ringback. As soon as the destination phone has com-
pleted a call and is free again, the caller is rung back. This feature must be supported by
the exchange. The ringback request is automatically cancelled after about 2 hours
(depending on the VoIP provider).
Ringback when the number is busy
= CCBS (Completion of Calls to Busy Subscriber). If a caller hears the busy tone, he or
she can activate the ringback function. As soon as the connection is free the caller is
rung back. As soon as the caller lifts his receiver the connection is made automatically.
ROM
Read Only Memory
A type of memory that can only be read, as opposed to RAM which can be both read and
written.
Router
Routes data packets within a network and between different networks via the quickest
route. Can connect Ethernet networks and WLAN. Can be a Gateway to the Internet.
Routing
Routing is the transfer of data packets to another subscriber in your network. On its way
to the recipient, the data packets are sent from one router to the next until it reaches its
destination.
If data packets were not forwarded in this way, a network like the Internet would not be
possible. Routing connects the individual networks to this global system.
A router is a part of this system; it transfers data packets both within a local network and
from one network to the next. Transfer of data from one network to another is per-
formed on the basis of a common protocol.
RTP
Realtime Transport Protocol
Global standard for transferring audio and video data. Often used in conjunction with
UDP. In this case, RTP packets are embedded in UDP packets.
RTP port
(Local) Port that is used to send and receive voice data packets for VoIP.
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