Polycom RMX 1500/2000/4000 Getting Started Guide

Abbreviation/

Explanation

Term

 

 

 

DTMF

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.

 

 

E1 Line

A 2Mb digital switched line used in Europe.

 

 

Endpoint

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).

 

 

FECC

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.

 

 

Frame

A group of bits that make up an elementary block of video

 

data for transmission by certain protocols.

 

 

Frame Rate

The number of video frames displayed on-screen during

 

one second, measured in fps (frames per second).

 

 

G.711

ITU-T audio algorithm, 64Kbps, 3.4 kHz.

 

 

G.722

ITU-T audio algorithm, 64Kbps, 7 kHz.

 

 

G.728

ITU-T audio algorithm, 16Kbps, 3.4 kHz.

 

 

Gatekeeper

A type of server that performs two main functions:

 

translates LAN alias addresses of terminals and gateways

 

to IP addresses and provides bandwidth management.

 

 

H.221

ITU-T standard that defines how to multiplex video, audio,

 

control, and user data into one serial bit stream.

 

 

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Polycom DOC2560B manual Dtmf

DOC2560B specifications

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