User Guide

165
Glossary
Gigaset A510IP / USA en / A31008-M2230-R301-2-6019 / Glossary.fm / 09.10.2012
Version 4, 16.09.2005
Registrar
The registrar manages the current IP addresses of the Network subscriber. When you register
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 party does not reply when called, a caller can
arrange an automatic ringback. As soon as the destination phone has completed a call and is
free again, the caller is called back. This feature must be supported by the exchange. The ring-
back request is automatically cancelled after about two hours (depending on the network pro-
vider).
Ringback when the number is busy
= CCBS (Completion of calls to busy subscriber). If a caller hears the busy tone, he or she can acti-
vate the ringback function. As soon as the connection is free, the caller is called back. As soon
as the caller lifts the earpiece, the connection is made automatically.
ROM
Read Only Memory
A type of memory that can only be read.
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 their way to
the recipient, the data packets are sent from one router to the next until they reach their desti-
nation.
If data packets were not forwarded in this way, a network like the Internet would not be possi-
ble. 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 performed on the basis
of a common protocol.
RTP
Real-Time 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.
S
Server
Provides a service to other Network subscribers (Clients). The term can indicate a computer/PC
or an application. A server is addressed via IP address/Domain names and Port.
SIP (Session Initiation Protocol)
Signalling protocol independent of voice communication. Used for establishing and ending a
call. It is also possible to define parameters for voice transmission.