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

Appendix A

Glossary

This appendix lists the terms and abbreviations that are related to the Polycom RMX 2000, and are commonly used in the RMX 2000 documentation.

Abbreviation/	Explanation
Term
Bandwidth	Defines the information carrying capacity of a channel. In
	analog systems, it is the difference between the highest
	frequency that a channel can carry and the lowest,
	measured in hertz. In digital systems, bandwidth is
	measured in bits per second. The larger a connection's
	bandwidth, the more data can be transmitted in a given
	amount of time, allowing for greater video resolution and
	more sites in a conference. For more information, see
	Line Rate.
Bps, Kbps	Bits and kilobits per second; a unit of bandwidth, that is
	the amount of data that can flow during one second over a
	communications line (using a transmission medium).
	1 Kbps=1000 Bps
Carrier	A telephone or other company that provides
	telecommunication transmission services.
CIF, 4CIF, QCIF	Common Intermediate Format, an optional part of the
	ITU-T's H.261 and H.263 standards. CIF specifies 288
	non-interlaced luminance lines, that contain 176 pixels.
	CIF can be sent at frame rates of 7.5, 10, 15, or 30 per
	second. When operating with CIF, the amount of data to
	transmit cannot exceed 256 K bits (where K equals
	1024).The CIF video format has the capacity to transmit
	video images of 352x288 pixels at 36.45 Mbps and 30
	frames per second. A 4CIF format has four times the
	capacity of CIF; QCIF has quarter the capacity of CIF.