channel bank
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channel bank definition - telecom
An early device designed to interface analog PBX or central office (CO) voice circuits to a DS-1 circuit. Channel banks perform two functions, in sequence. First, they multiplex up to 24 analog signals on a common pulse amplitude modulation (PAM) electrical bus. Second, they encode the individual PAM channels into a digital format, using pulse code modulation (PCM), for transmission over a DS-1 circuit. Channel banks place each voice conversation on a separate channel. A given channel can support a digital data transmission, rather than a voice transmission. For example, a data transmission at 9.6 kbps or 19.2 kbps originally occupied a full DS-0 channel of 64 kbps, just as does a 56 kbps data transmission or a digitized voice conversation. Later, sub-rate multiplexing allowed as many as 5 channels of 9600 bps to share a DS-0 channel. See also bus, DS-0, DS-1, multiplexer, PAM, and PCM.
Webster's New World Telecom Dictionary Copyright © 2008 by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.
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"channel bank." Webster's New World Telecom Dictionary. 2009
- Your Dictionary. 5 July 2009
- <www.yourdictionary.com/telecom/channel-bank>
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channel bank. (2009). In Webster's New World Telecom Dictionary
- Retrieved July 5th, 2009, from www.yourdictionary.com/telecom/channel-bank
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