Gigaset A580 IP User Manual page 183

Glossary
Proxy/proxy server
Computer program that controls the exchange of data between
in computer networks. If the phone sends a query to the VoIP server, the proxy acts
as a server towards the phone and as a client towards the server. A proxy is
addressed via
Public IP address
The public IP address is the address for a network component on the Internet. It is
assigned by the Internet Service Provider. Devices that act as a link from a local net-
work to the Internet (gateway, router) have a public and a local IP address.
£
IP address
Q
Quality of Service (QoS)
Describes the Quality of Service in communication networks. Differentiations are
made between various Quality of Service classes.
QoS influences the flow of data packets on the Internet, e.g. by prioritising data
packets, reserving bandwidth and data packet optimisation.
In VoIP networks, QoS influences the voice quality. If the whole infrastructure
(router, network server etc.) has QoS, the voice quality is better, i.e. fewer delays, less
echoing, less crackling.
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
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.
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
the Internet.
182
Domain name/IP address
and NAT
Network
Ethernet networks
and Port.
subscribers' current IP addresses. When you
and WLAN. Can be a
Client and Server
Gateway to