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Integrators’ Reference Manual for ViewStation EX, ViewStation FX, and VS4000
6 www.polycom.com
H.323 ITU-T videoconferencing standard for IP. H.323
includes the H.225, H.245, G.711, G.722, G.723.1,
G.728, and G.729 standards.
IMUX Inverse Multiplexer. See Quad BRI network
interface module.
IP Internet Protocol. A unique IP address identifies
every computer connected to the Internet. IP
addresses take the form
255.255.255.255; each
of the four numbers is in the range 0 to 255.
IP Precedence Audio, video and far end camera control packets
may be assigned a higher priority than other
network traffic. Precedence 4 is recommended for
multimedia data. By default, IP precedence is
disabled by most routers and is not enabled on the
Internet.
ISDN Integrated Services Digital Network. Digital
telephone service, available at 128 Kbps (BRI),
1.544 Mbps (PRI), and Broadband ISDN (2 Mbps -
600 Mbps).
ISP Internet Service Provider.
LAN Local Area Network. A network that serves users
within a confined geographical area. It includes
servers, workstations, a network operating
system and a communications link.
LED Light-Emitting Diode. An indicator lamp.
MCU Multipoint Conferencing Unit or Multi Control
Unit. Hardware that allows three or more
videoconferencing systems to participate in an
interactive multi-way conference.
Multicast A one-to-many transmission that goes to
designated recipients only.
Multipoint call A call in which more than two sites participate.
Near End Your end or local end site of the videoconference.
Network side The portion of a network interface module that
connects to the network. See also Upstream.