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Glossary of Acronyms Glossary of Acronyms This glossary provides short definitions of a range of abbreviations· and acronyms in use within the cordless telecommunications field; many of the terms are defined in greater detail within this volume. ACCH associated control channel ACELP algebraic code-excited linear prediction, vocoder ACK acknowledgement protocol ACTE Approval Committee for Telecommunication Equipment ACW address code word ADM adaptive delta modulation ADPCM adaptive differential pulse-code modulation AGC automatic gain control AIN advanced intelligent network ALT automatic link transfer AM access manager AMPS American Mobile Phone System - US cellular standard API application programming interface ARA alerting/registration area ARI access rights identifier ARIB Association of Radio Industries and Businesses (Japan) ARQ automatic repeat request ATIS Alliance for Telecommunications Industry Solutions (USA) AWGN additive white Gaussian noise B echo balance return loss B channel user information bearer channel, 64 kb s-l, in ISDN BABT British Approvals Board for Telecommunications BCCH broadcast channel BCT business cordless telephone BER bit error ratio BMC/BMD burst mode controller/device BPSK binary phase shift keying, modulation BRA ISDN basic rate access BS basestation - the fixed radio component of a cordless link, single-channel or multichannel; term also used in cellular radio Glossary of Acronyms 507 BS6833 a standard for digital cordless telephones allowing for proprietary air interfaces (mainly specifying telephony-related aspects) (UK) BSC basestation controller BT bandwidth x time product for GMSK modulation BTR bit timing recovery, used to permit synchronisation across a radio link CAl Common Air Interface standard, as in the CT2 standard CAS cordless access service(s) CATV cable television CBCS cordless business communication system, supporting wireless PABX and data applications, for example, in the business environment CCCH common control channel CCF cluster control functions CCFP common control fixed part CCH control channel CCIR Consultative Committee for Radio - part of the previous ITU structure (now ITU-R) CCITT Consultative Committee for Telecommunications - part of the previous ITU structure (now ITU-T) CCT Combined CDMA/TDMA (IS-661) standard (USA) CDC cordless data controller CDMA code-division multiple access CEC Commission of the European Communities CELP code-excited linear prediction, vocoder CEN Comite Europeen de Normalisation CENELEC Comite Europeen de Normalisation Electrotechnique CEPT Conference of European Posts and Telecommunications CFP cordless fixed part, e.g. a cordless telephone basestation CHMF synchronisation pattern used in CT2 CHMP synchronisation pattern used in CT2 CI channel identity sequence, used for over-the-air identification of a radio transmission CI common interface, type of specification CISPR Comite International Special Perturbations Radio CLR connection loudness rating COST Cooperation in Science and Technology Programme (Europe) COST 231 COST committee dealing with future mobile systems CPBX cordless PBX - same as a wireless PBX CPE customer premises equipment CPFSK continuous phase frequency shift keying, modulation CPP cordless portable part - the cordless telephone handset carried by the user CR carrier recovery CRC cyclic redundancy check CRFP cordless radio fixed part CS cell station, a PHS basestation 508 Glossary of Acronyms CS-ACELP conjugate structure algebraic code-excited linear prediction, vocoder CS2, CS3 intelligent network, capability set 2, 3 CSF cell site function CSMA carrier sense multiple access CSMA/CA carrier sense multiple access with collision avoidance CTO the original analogue VHF/LF cordless telephone technology, as used in the UK, France and elsewhere CTl Cordless Telephone Generation One - in Europe 900 MHz analogue FM; also known as CEPT/CTl; sometimes in the UK the term was and occasionally still is used to refer to the CTO technology CT1+ later version of the CEPT CTl standard, with additional channels CT2 Second Generation Cordless Telephone-Digital - originally developed in the UK and subsequently accepted by ETSI as an l­ ETS CT2plus Canadian variant of CT2 CT3 early Swedish digital cordless standard CTM cordless terminal mobility, an application concept and an ETSI project CTN cordless telecommunication network CTR common technical regulation CVSDM continuously variable slope delta modulation D channel control and information data channel, 16 kb S-l, in ISDN DAM DECT authentication module DASS digital access signalling system DCA dynamic channel assignment DCE data communications equipment DCS digital cellular system (see DCS1800) DCS dynamic channel selection DCS1800 Digital Cellular System 1800 MHz - the 1800 MHz version of the GSM digital cellular radio standard DCT digital cordless telephone DCT900 early CT3 standard cordless telephone product from Ericsson DCW data code word DECT Digital Enhanced Cordless Telecommunications - the ETSI standard (originally, prior to 1995, Digital European Cordless Telephone) DFS DECT fixed system DLC data link control layer, protocol layer downlink transmission link from the fixed part to the portable part DPCM differential pulse-code modulation DPNSS inter-PABX signalling system DPS DECT portable system DQPSK differential QPSK modulation DRT diagnostic rhyme test, used in speech quality measurements DSP digital signal processing Glossary of Acronyms 509 DSSI ISDN signalling protocol DTAAB DECT Type Approval Advisory Board DTI Department of Trade and Industry (UK) DTMF dual tone multiple frequency, audio tone signalling system duplex simultaneous two-way communication DVSDM digitally variable slope delta modulation EC European Commission ECMA European association for standardising information and communication systems ECTEL European association of tAe telecommunications manufacturing industry EFR enhanced full-rate codec, developed for US PCS1900 EMC electromagnetic compatibility EOC embedded operations channel ERC European Radiocommunications Committee ERMES European Radio Messaging Standard - digital paging standard specified by ETSI ERO European Radiocommunications Office ERP earpiece reference point ERP effective radiated power ESPA European Selective Paging Association ETR ETSI Technical Report ETS European Telecommunications Standard ETSI European Telecommunications Standards Institute FACCH fast associated control channel FCC Federal Communications Commission (USA) FCS frame check sequence FCS free channel search FDD frequency-division duplex FDMA frequency-division multiple access FEC forward error correction FH frequency hopping FHMA frequency hopping multiple access FPLMTS Future Public Land Mobile Telecommunications System FSK frequency shift keying FT fixed termination GAP generic access profile of DECT GFSK Gaussian-filtered FSK modulation GIP GSM interworking profile of DECT GMSK Gaussian-filtered minimum shift keying GoS grade of service GPRS generalised packet radio service, of GSM GPS Global Positioning System 510 Glossary of Acronyms GSM Global System for Mobile - the digital cellular radio system specified by ETSI and now adopted in many countries worldwide handoff procedure whereby communications between a cordless terminal and a basestation are automatically routed via an alternative basestation (or possibly via an alternative channel to the same basestation) when this is necessary and appropriate to maintain or improve communications handover another term for handoff HDLC high-level data link control - type of protocol HDSL high-density subscriber link HIPERLAN High Performance Radio Local Area Network HLR home location register, used in cellular systems and which might be used in future enhanced public cordless systems I-ETS interim ETS lAP ISDN access profile, of DECT IEC International Electrotechnical Commission IEEE 802.11 a spread-spectrum data communication standard (USA) IF intermediate frequency IMEI international mobile station equipment identity (GSM feature) IN intelligent network INAP intelligent network application part IPE! international personal equipment identity (DECT feature) IS54 a digital AMPS standard (USA) IS95 a CDMA digital cellular standard (USA) ISDN integrated services digital network ISM industrial, scientific and medical frequency band ISO International Standards Organisation ISPABX integrated services P ABX ITSTC Information Technology Steering Committee ITU International Telecommunications Union IWP interworking profile IWU interworking unit JLR junction loudness rating JTC TIA/Tl Joint Technical Committee - US PCS standardisation committee LAI local area identifier LAN local area network LAPB link access protocol-bearer channel LAPD link access protocol-data channel LAPR link access protocol radio Glossary of Acronyms 511 LBT listen before talk - part of the US UPCS spectrum etiquette, FCC Part 15 Subpart D rules LCD liquid-crystal display LCI local CFP identifier LD-CELP low-delay code-excited linear prediction, vocoder LDB location database LDM linear delta modulation LE local exchange LEC local exchange carrier LFA lowest frequency below threshold algorithm LIA least interference algorithm LID Link identification code LLME lower layer management entity LNA low-noise amplifier LPC linear predictive coding LR location register (as in cellular radio) LR loudness rating MAC medium access control, protocol layer MAHO mobile assisted handover MAP mobile access part, of the SS7 protocol MC marker channel MCHO mobile controlled handover MDT mobile
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