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Glossary
Acronyms GuideADPCM adaptive pulse-code modulation ANSI American National Standards Institute ATM asynchronous transfer mode BRI basic rate interface CED CallED station IDentification CELP code excited linear prediction CFR confirmation to receive CIR committed information range CNG calling tone CRC cyclic redundancy check CRP command repeat CSI called subscriber information DCN disconnect message DCS digital command signal DIS digital identification signal DLCI data-link connection identifier DSP digital signal processor DTMF dual-tone multifrequency E&M ear & mouth, earth, and magneto EOP end of procedures FIFO first in, first out FIU facsimile interface unit FM fax modem unit FND fax network driver unit FoIP fax over Internet protocol FP fax protocol unit FXO foreign exchange office FXS foreign exchange station HDLC high-level data link control IETF Internet Engineering Task Force IP internet protocol ISDN integrated services digital network ITU International Telecommunications Union IWF interworking funtion LMI local management interface MCF message confirmation MIB management information base MPS multipage signal NSF nonstandard facilities PBX Private branch exchange PCM pulse code modulation POTS plain old telephone service PRI primary rate interface PSTN public switched telephone network PVC permanent virtual circuit QoS quality of service RTCP real-time conferencing protocol RTP real-time protocol SVC switched virtual circuit TCF training check field TCP Transmission Control Protocol UDP user datagram protocol UNI user network interface V/FoIP voice and fax over Internet protocol VoFR voice over frame relay VoIP voice over Internet protocol VToA voice telephony over ATM
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