RADVision MCU-323, Руководство пользователя

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Glossary
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G.729 A/B
An ITU standard for speech codecs that provides near toll quality audio at 8 Kbps using the
CS–ACELP method. G.729 Annex A is a reduced complexity codec and G.729 Annex B
supports silence suppression and comfort-noise generation.
Gatekeeper
The gatekeeper is an H.323 entity that provides address resolution, access control and other
services to endpoints on an H.323 network.
Gateway hunting
The Gatekeeper’s ability to search for an available Gateway. When the Gatekeeper receives
a call request prefixed by a service supported by several Gateways, the Gatekeeper forwards
the call to the first available Gateway supporting the requested service.
Group hunting
The Gatekeeper’s ability to search for an available terminal within a definition group of
terminals. Terminals can be defined as definition groups by registering with the Gatekeeper
as service providers.
H.320
The ITU standard for videoconferencing over digital networks such as ISDN.
H.323
The ITU standard for videoconferencing over packet switched networks such as LANs and
the Internet.
IMUX
Inverse Multiplexor is a device that divides a high-speed transmission into several low-
speed transmissions and vice versa. It is used to transmit LAN and videoconferencing traffic
over lower-speed digital channels.
IP address
The unique address of a computer attached to a TCP/IP network. IP addresses are 32 bit
long where each octet is represented in decimal and is separated by dots.
IP network
A network that uses the TCP/IP protocol.
ISDN
Integrated Services Digital Network. ISDN is an entirely digital telephone network that
allows both data and voice communication over the same line. ISDN replaces the old analog
local loop and operates at significantly faster speeds than the traditional telephone service.