ution protocol automatic rerouting ASCII American Standard Code for Information Interchange amplitude shift keying all trunks busy asynchronous transfer mode Advanced Television System Committee American Telephone & Telegraph (Corp.) administrative unit, access unit Fundamentals of Telecommunications, Second Edition, by Roger L. Freeman ISBN 0-471-71045-8 Copyright © 2005 by Roger L. Freeman ACRONYMS AND ABBREVIATIONS administrative unit group attachment unit interface American Wire Gauge additive white Gaussian noise B3ZS, B6ZS, B8ZS binary 3 zero substitution, binary 6 zero substitution, binary 8 zero substitution block check count binary-coded decimal Bose-Chaudhuri-Hocquenghem (a family of block codes) backward explicit congestion notification Bellcore Bell Communications Research bit error rate, bit error ratio bit error rate test binary frequency shift keying busy hour bit-interleaved parity B-ISDN broadband ISDN binary digit built-in test equipment building-integrated timing supply baseband interface unit binary n-zeros substitution Bell Operating Company beginning of message bandpass bits per second binary phase shift keying bipolar violation BRA, BRI basic rate (interface) backward sequence number Bell System Technical Journal bridged tap Bell Telephone Laboratories connection admission control competitive access provider community antenna television connectionless broadband data services constant bit rate International Consultive Committee for Radio CCITT International Consultive Committee for Telephone and Telegraph ccs, CCS cent call second compact disk; collision detection code division multiple access cellular digital packet data cell delay variation called station identification (fax) codebook-excited linear predictive (coder) Conference European Post and Telegraph (from the French) ACRONYMS AND ABBREVIATIONS cellular geographic serving area carrier-to-interference (ratio) committed information rate connectionless consolidated link layer management CLNAP connectionless network access protocol cell 