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E List of Acronyms ADSL asymmetric digital subscriber line ANSI American National Standards Institute ASIC application specific integrated circuit ATM asynchronous transfer mode BLEC building-focused local exchange carriers CATV originally community antenna television; now synonymous with cable TV CDMA code-division multiple access CDPD cellular digital packet data CLEC competitive local exchange carrier CO central office CPE customer premises equipment DARPA Defense Advanced Research Projects Agency DBS direct broadcast satellite DHCP dynamic host configuration protocol DLC digital loop carrier DLEC data local exchange carrier DMT discrete multitone transmission DSL digital subscriber line DSLAM DSL access multiplexer DSP digital signal processor ETSI European Telecommunications Standards Institute FCC Federal Communications Commission FEXT far end cross talk FTTC fiber to the curb 318
APPENDIX E 319 FTTH fiber to the home GEOS geo-synchronous orbit satellites HDSL high-speed digital subscriber line HDTV high definition television HFC hybrid fiber coax HPNA Home Phone Networking Alliance IEEE Institute of Electrical and Electronics Engineers IETF Internet Engineering Task Force ILEC incumbent local exchange carrier IP Internet protocol ISDN integrated services digital network ISP Internet service provider ITU International Telecommunication Union LAN local area network LEC local exchange carrier LEOS low earth orbit satellites LMDS local multipoint distribution services LOS line of sight MAC medium access control MDUs multi-dwelling units MIMO multiple in, multiple out MMDS multipoint multichannel distribution service MSO multiple system operator NEXT near end cross talk NII national information infrastructure NSF National Science Foundation NSP native signal processor NTIA National Telecommunications and Information Administration OFDM orthogonal frequency division multiplexing PCS personal communications service PEG public, educational, and government PON passive optical network POTS plain old telephone service PPP point-to-point protocol PSD power spectral density QAM quadrature amplitude modulation QOS quality of service RADSL rate adaptive digital subscriber line RF radio frequency RLP radio link protocol SDMI Secure Digital Music Initiative SDSL symmetric digital subscriber line SDTV standard definition television
320 APPENDIX E SONET synchronous optical network TDM time division multiplexing TDMA time division multiple access UDP user datagram protocol USB universal serial bus VADSL very-high data rate asymmetric DSL VDSL very high speed digital subscriber line VLSI very large scale integrated circuit VOD video on demand VoDSL voice over DSL VoIP voice over Internet Protocol VPN virtual private network VTIP video telephony over Internet Protocol (IP) W3C World Wide Web Consortium WAN wide area network WDM wavelength-division multiplexing WLAN wireless local area network WLL wireless local loop