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The following HTML text is provided to enhance online readability. Many aspects of typography translate only awkwardly to HTML. Please use the page image as the authoritative form to ensure accuracy. 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
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