Polycom DOC2560A manual Abbreviation, Explanation, Term

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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