Polycom RMX 2000 manual Abbreviation, Explanation, Term, Appendix A-Glossary

Appendix A-Glossary

Abbreviation/	Explanation
Term
Codec	Coder-decoder. A device that converts voice and video
	into digital code, and vice versa. Refers to the endpoint
	video camera and video board that are used for
	videoconferencing.
Conference	Connection between two or more endpoints exchanging
	video and audio information. If only two endpoints are
	involved, a conference is called point-to-pointand 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.
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.
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.

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