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Polycom RMX 2000 Administrator’s Guide
A-3
G.722 ITU-T audio algorithm, 64Kbps, 7 kHz.
G.728 ITU-T audio algorithm, 16Kbps, 3.4 kHz.
Gatekeeper A type of server that performs two main functions:
translates LAN alias addresses of terminals and gateways
to IP addresses and provides bandwidth management.
H.221 ITU-T standard that defines how to multiplex video, audio,
control, and user data into one serial bit stream.
H.230 ITU-T standard that defines simple multipoint control
systems procedures and describes network maintenance
functions.
H.231 ITU-T standard that defines a set of MCU functions and
operational requirements.
H.242 ITU-T standard that defines initiation of communications
between systems and capabilities negotiation procedures.
H.243 ITU-T standard that defines initiation of communications
between systems and capabilities negotiation procedures
in multipoint conferences.
H.261 ITU-T standard that defines the Px64 video coding
algorithm.
H.263 ITU-T standard that provides improved compression and
quality of video images at a line rate lower than 384 Kbps.
This standard is not supported by all codecs.
H.264* A proprietary Polycom Video compression standard.
H.264 ITU-T standard that provides improved compression and
quality of video images in lower line rate connections and
is part of the Highest Common mechanism in Video
Switching conferences.
H.320 ITU-T standard that defines how the H-series video
conferencing recommendations work together.
H.323 ITU-T standard for audio, video and data communications
across IP-based (LAN) networks, including the Internet.
Abbreviation/
Term
Explanation