Polycom RMX 2000 Getting Started Manual page 132

Appendix A-Glossary
A-4
Abbreviation/
Explanation
Term
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.
IP Internet Protocol. The working protocol that forms the
basis of the internet.
ISDN Integrated Services Digital Network. A set of protocol and
interface standards (voice, video and data) that comprise
a telephone network. There are two types of ISDN lines:
BRI and PRI.