signed this ID.
Q-Interface Signalling Protocol (Q-SIG) is an ISDN-based signalling
protocol for linking PABX systems.
Quality of Service (QoS) describes the properties of the communica-
tion service. It is defined using bandwidth, delay, packet losses and
jitter. To transmit time-critical data packets for VoIP or video stream-
ing as quickly as possible, QoS is used to sort all the data packets
into groups and forward them on in the network either more quickly
or slowly, depending on their priority.
The data packets accumulate in a queue before they are sent.
Remote Authentication Dial-In User Service (RADIUS) is a client-
server protocol for authenticating, authorising and accounting for
users with dial-in connections. The RADIUS server authenticates
the client, e. g. by checking the username and password. See also
.
See G.992.5.
Real Time Jitter Control is used, where necessary, to reduce the
size of data packets during a telephone conversation so that voice
packets are not blocked.
The SIP server (registrar) needs to be used in case the subscribers
to a VoIP call are not using static IP addresses The SIP server re-
gisters the clients' IP addresses and sends this data to the SIP
proxy, which connects the calls. The SIP proxy and SIP registrar are
usually identical.
When a phone number that has not been set up in the telephone
system is dialled, or if the connection of the party called is engaged,
or the party called does not take the call, the reject function determ-
ines how to proceed with the call. The call can be routed to a differ-
ent destination or discarded.
A repeater is a device that strengthens electric or optical signals and
thus increases the range of the network.
This returns the device to its unconfigured state.
A Request For Comments (RFC) is a document that describes the
standards and guidelines for the Internet.
See AES.
Glossary
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