Polycom ViewStation EX4000 User Manual

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Chapter 1 - About this Manual

Endpoint

A site, videoconferencing system, gateway, or
MCU.

Ethernet

10 Mbps or 100 Mbps LAN technology based on
CSMA/CD.

Far End

The party or parties to whom you place a call.

Fast Ethernet

100 Mbps LAN technology based on CSMA/CD.

FCIF

Full CIF. See CIF.

Firewall

A network node set up as a boundary to prevent
traffic from one segment to cross over into
another.

fps

Frames per second. Note that there are two fields
per frame.

FTP

File Transfer Protocol. A part of the chief Internet
protocol stack or group (TCP/IP) used for
transferring files.

Full Duplex

Transmission in two directions at once
(bidirectional communication). In a full-duplex
call, all participants can both talk and hear others
at the same time.

Gatekeeper

An H.323 device that provides address
translation, control access, and bandwidth
management to the LAN.

Gateway

An H.323 device that provide real-time, two-way
communication between dissimilar (H.323 and
H.320) endpoints operating across dissimilar
networks.

GUI

Graphical User Interface. A user interface that
incorporates icons, command menus, and other
graphical elements. GUI-based software requires
the use of a mouse, touch-screen, or other pointing
device.

H.320

ITU-T videoconferencing standards for ISDN.