Polycom 1500 Getting Started Manual page 195

RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Getting Started Guide
Abbreviation/Term
Conference
CSU
DBA
DTMF
E1 Line
Endpoint
FECC
Frame
Frame Rate
G.711
G.722
G.728
Gatekeeper
H.221
H.230
H.231
H.242
H.243
Polycom®, Inc.
Explanation
Connection between two or more endpoints exchanging video and audio information. If
only two endpoints are involved, a conference is called point-to-point and no MCU is
required. If more than two endpoints are involved, it is called a multipoint conference, and
an MCU (Multipoint Control Unit) is required as the management system. For more
information, see MCU.
Channel Service Unit. Customer-provided equipment that is used as an interface between
a communication network and the data terminal.
Dynamic Bandwidth Allocation. Used to allocate the bandwidth needed to transmit the
additional packets for LPR.
Dual Tone Multi Frequency. A system of coded signals used by touch-tone telephones in
which a specific sound, frequency or tone is assigned to each key so that the signal can be
easily recognized by a computer. The codes enable data input and control of
voice-processing systems. DTMF signals can pass through the entire connection to the
destination device and therefore are used for remote control after the connection with the
MCU is established.
A 2Mb digital switched line used in Europe.
A hardware device, or set of devices, that can call, and be called by an MCU or another
endpoint. For example, an endpoint can be a phone, a camera and microphone connected
to a PC or an integrated Room System (conferencing system).
Far End Camera Control. In certain video cameras, the accompanying software that
enables a participant to control a remote camera. Used in Continuous Presence video
conferences in conjunction with the LSD option. For more information, see LSD.
A group of bits that make up an elementary block of video data for transmission by certain
protocols.
The number of video frames displayed on-screen during one second, measured in fps
(frames per second).
ITU-T audio algorithm, 64Kbps, 3.4 kHz.
ITU-T audio algorithm, 64Kbps, 7 kHz.
ITU-T audio algorithm, 16Kbps, 3.4 kHz.
A type of server that performs two main functions: translates LAN alias addresses of
terminals and gateways to IP addresses and provides bandwidth management.
ITU-T standard that defines how to multiplex video, audio, control, and user data into one
serial bit stream.
ITU-T standard that defines simple multipoint control systems procedures and describes
network maintenance functions.
ITU-T standard that defines a set of MCU functions and operational requirements.
ITU-T standard that defines initiation of communications between systems and capabilities
negotiation procedures.
ITU-T standard that defines initiation of communications between systems and capabilities
negotiation procedures in multipoint conferences.
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