Siemens GIGASET A580 User Manual page 181

Glossary
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 network 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.
The registrar manages the
Registrar
you register with your VoIP provider, your current IP address is saved on the reg-
istrar. 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 desti-
nation phone has completed a call and is free again, the caller is rung back. This
feature must be supported by the exchange. The ringback request is automat-
ically 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 the receiver the connection is
made automatically.
ROM
Read Only Memory
A type of memory that can only be read.
Routes data packets within a network and between different networks via the
Router
quickest route. Can connect
to the Internet.
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and NAT
Network
Ethernet
subscriber's current IP addresses. When
networks and WLAN. Can be a Gateway