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MGC Manager User’s Guide - VoicePlus Edition
A-5
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.
IMUX or Inverse
Multiplexing
A feature that allows high speed serial data streams to be
divided into multiple of 56 or 64 Kbps for transmission over
public digital switched networks (PSTN). At the remote end,
all the channels are phase-aligned and synchronized to
recreate the original data stream.
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.
ITU-T Standard International Telecommunications Union, Telecommunication
Standardization Sector (formerly CCITT). The international
organization that produces official standards for
telecommunications.
LAN Local Area Network. A group of computers and other devices
linked via a network’s operating system.
LDAP Lightweight Directory Access Protocol.
Leased Line A dedicated PRI line supplied by the telephone company. See
also PRI line.
Line Rate The amount of bandwidth used by a communication device,
measured in Kbps (kilobytes per second).
MCU Multipoint Control Unit. Device which allows more than two
sites to be connected in a video or audio conference.
MPI Multi Protocol Interface. Supports connection to endpoints
using communication protocols such as V.35 RS-449 and RS-
530 over a serial connection.
Abbreviation/
Term
Explanation