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Glossary
Gigaset C470-475 IP / EN for IM-Ost / A31008-xxxx-xxxx-x-xxxx / glossary.fm / 16.8.07
Version 2.1, 08.01.2007
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.
S
Server
Provides a service to other Network subscribers (Clients). The term can indicate a com-
puter/PC or an application. A server is addressed via IP address/Domain name 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.
SIP address
See URI.
SIP port/Local SIP port
(Local) Port which is used to send and receive SIP signalling data for VoIP.
SIP provider
See VoIP provider.
SIP proxy server
IP address of your VoIP provider's gateway server.
Static IP address
A static IP address is assigned to a network component manually during network con-
figuration. Unlike a Dynamic IP address a static (fixed) IP address never changes.
VoIPon www.voipon.co.uk sales@voipon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
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