loss priority circuit loudness rating connectionless service functions carrier-to-noise in 1-Hz bandwidth C/N, CNR carrier-to-noise ratio CODEC, codec coder-decoder continuation of message compander compressor-expander CONUS contiguous United States central office terminal common part convergence sublayer customer premises equipment central processing unit CRC, crc cyclic redundancy check corrected reference equivalent concentrated range extender with gain cathode-ray tube convergence sublayer carrier serving area convergence sublayer indicator CSMA, CSMA/CD carrier sense multiple access, carrier sense multiple access with collision detection composite second-order (products) cordless telephone carrier (level)-to-noise temperature ratio composite triple beat closed user group continuous variable slope delta modulation digital-to-analog destination address demand assignment multiple access DARPA, DARPANET Defense Advanced Research Projects Agency (network) decibel decibels referenced to the carrier level dB referenced to a dipole (antenna) dB over an isotropic (antenna) dB referenced to a milliwatt dBm psophometrically weighted dB referenced to a millivolt dBm referenced to the zero test level point (0 TLP) DBPSK differential binary PSK decibels above or below "reference" dBrnC dB reference noise C-message weighted ACRONYMS AND ABBREVIATIONS decibels referenced to a microvolt decibels referenced to 1 watt dc, DC direct current data communications equipment, data circuit-terminating equipment DCPBH double channel planar buried heterostructure digital cross-connect (system) digital data system digital European cordless telephone distributed feedback (laser) data link digital loop carrier data link connection identifier directory number dynamic nonhierarchical routing decineper Department of Defense (U.S.) destination point code distributed queue dual bus DQPSK differential QPSK distance/radius DSO, DS1, DS1C, DS2 "digital system" 0, 1, 1C, etc., the North American PCM hierarchy direct sequence destination service ac