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Glossary
© Polycom, Inc. 221 ViewStation User Guide
GHIJK
Gatekeeper An H.323 device that provides address
translation, control access, and bandwidth
management to the LAN.
Gateway An H.323 entity that provides real-time,
two-way communication between dissimilar
(H.323 and H.320) end points operating
across dissimilar networks by reformatting
data and protocols.
GUI (Graphical User Interface) A graphics-based user interface that
incorporates icons, pull-down menus, and a
mouse. The GUI has become the standard
way users interact with a computer. The
three major GUIs are Windows, Macintosh,
and Motif. In a client/server environment, the
GUI resides in the user's client machine.
H.320 The most common family of ITU-T
videoconferencing standards. These
standards allow ISDN BRI
videoconferencing systems to communicate.
H.323 Serves as the umbrella for a set of standards
defining real-time multimedia
communications for packet-based networks,
otherwise known as IP telephony. H.323 is
comprised of the following standards: H.225,
H.245, G.711, G.722, G.723.1, G.728, G.729
Intranet A new network model based on the idea of
making information and communications as
accessible on internal corporate networks as
it is on the public Internet.