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Glossary of Terms This glossary is reproduced from the recent book 'Cordless Telecommunications Worldwide', with kind permission from the author and the publishers, Springer Verlag. Most of the terms are explained in considerable more detail in the book. If you've looked for a term which you think ought to be in here that isn't, please tell us, so that we can include it in a coming update. Thank you. A B C D E F G H I JK L M N O P Q R S T U V WXYZ 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 Japanese Association of Radio Industries and Businesses ARQ Automatic Repeat Request ATIS The US Alliance for Telecommunications Industry Solutions AWGN Additive White Gaussian Noise B Echo Balance Return Loss B channel User information bearer channel, 64 kbits/s, 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 Base station - the fixed radio component of a cordless link, single channel or multi channel. Term also used in cellular radio BSC Base station controller BS6833 A UK standard for digital cordless telephones allowing for proprietary air interfaces, (mainly specifying telephony related aspects) BT Bandwidth-Time product for GMSK modulation BTR Bit Timing Recovery, used to permit synchronisation across a radio link CAI 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 CCT Combined CDMA / TDMA (IS-661 standard) 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) CDC Cordless Data Controller CDMA Code Division Multiple Access CEC Commission of the European Communities CELP Code Excited Linear Prediction, vocoder CEN Comité Européen de Normalisation CENELEC Comité Européen de Normalisation Electrotechnique CEPT Conference of European Posts and Telecommunications CFP Cordless Fixed Part , eg a cordless telephone base station CHMF Synchronisation pattern used in CT2 CHMP Synchronisation pattern used in CT2 CI Common Interface, type of specification or Channel Identity sequence, used for over the air identification of a radio transmission CISPR Comité International Spécial Perturbations Radio CLR Connection Loudness Rating COST The European Cooperation in Science and Technology Programme COST 231 The 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 CS2, CS3 Intelligent Network, Capability Set 2, 3 CS-ACELP Conjugate Structure Algebraic Code-Excited Linear Prediction, vocoder CSF Cell Site Function CSMA Carrier Sense Multiple Access CSMA/CA Carrier Sense Multiple Access with Collision Avoidance CT0 The original analogue VHF/LF cordless telephone technology, as used in the UK, France and elsewhere CT1 Cordless Telephone Generation One - in Europe 900 MHz analogue FM - also known as CEPT/CT1. Sometimes in the UK the term was and occasionally still is used to refer to the CT0 technology CT1+ Later version of the CEPT CT1 standard, with additional channels CT2 Second Generation Cordless Telephone - Digital - originally developed in the UK and subsequently accepted by ETSI as an IETS CT2plus Canadian variant of CT2 CT3 Early Swedish digital cordless standard CTM Cordless Terminal Mobility, an ETSI project as well as an application concept CTN Cordless Telecommunication Network CTR Common Technical Regulation CVSDM Continuously Variable Slope Delta Modulation D channel Control and information data channel, 16 kbits/s in ISDN DAM DECT Authentication Module DASS Digital Access Signalling System DCA Dynamic Channel Assignment DCE Data Communications Equipment DCS Dynamic Channel Selection or Digital Cellular System (see DCS1800) 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 Telecommunications) DFS DECT Fixed System DLC Data Link Control layer, protocol layer Downlink The 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 DSS1 ISDN signalling protocol DTAAB DECT Type Approval Advisory Board DTI UK Department of Trade and Industry 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 the Telecommunications Manufacturing Industry EFR Enhanced Full Rate codec, developed for US PCS EMC ElectroMagnetic Compatibility EOC Embedded Operations Channel ERC European Radiocommunications Committee ERO European Radiocommunications Office ERMES European Radio MEssaging Standard, digital paging standard specified by ETSI ERP Effective Radiated Power or Earpiece Reference Point ESPA European Selective Paging Association ETR ETSI Technical Report ETS European Telecommunications Standard ETSI European Telecommunications Standards Institute FACCH Fast Associated Control Channel FCC US Federal Communications Commission FCS Free Channel Search or Frame Check Sequence 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 GSM Global System for Mobile, the digital cellular radio system specified by ETSI and now adopted in many countries worldwide Handoff The 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 base station) 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 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 IAP ISDN Access Profile, of DECT IEC International Electrotechnical Commission IEEE 802.11 US spread spectrum data communication standard I-ETS Interim ETS IF Intermediate Frequency IMEI International Mobile station Equipment Identity (GSM feature) IN Intelligent Network INAP Intelligent Network Application Part IPEI International Personal Equipment Identity (DECT feature) IS54 US digital AMPS standard IS95 US CDMA cellular standard ISDN Integrated Services Digital Network ISM Industrial, Scientific and Medical frequency band ISO International Standards Organisation ISPABX Integrated Services PABX ITSTC Information Technology Steering Committee ITU International Telecommunications Union IWP Interworking Profile IWU Interworking Unit JLR Junction Loudness Rating JTC The TIA/T1 Joint Techncal Committee, US PCS standardisation committee LAN Local Area Network LAPB Link Access Protocol - Bearer channel LAPD Link Access Protocol - Data channel LAPR Link Access Protocol Radio LAI Local Area Identifier 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 LDB Location Data Base LD-CELP Low Delay Code Excited Linear Prediction, vocoder LDM Linear Delta Modulation LE Local Exchange LEC Local Exchange Carrier LFA Lowest Frequency below threshold Algorithm LIA Least Interference Algorithm LLME Lower Layer Management Entity LNA Low Noise Amplifier LPC Linear Predictive Coding LR Loudness Rating or Location Register (as in cellular radio) 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 Data Terminal Microdiversity Diversity between antennas with relatively small spacing (of order quarter wavelength) to counter multipath fading effects MKK Radio Equipment Inspection and Certification Institute of Japan MMI Man Machine Interface MOS Mean Opinion Score, used in speech quality measurements MoU Memorandum of Understanding MPEG Motion Pictures Expert Group, developing video codec standards MPT1317 UK standard for data signalling over a radio path MPT1334 UK standard for digital cordless telephones allowing for proprietary air interfaces, (mainly specifying radio related aspects) MPT1375 UK standard for Common Air Interface, CAI, digital cordless telephones MRP Mouthpiece Reference Point MSC Mobile services Switching Centre, as in cellular radio MSK Minimum Shift Keying modulation MUX1 The traffic channel multiplex in PCI, same as MUX1.4 in CT2 MUX1.2 The multiplex within the CT2 standard containing 64 B channel bits and 2 D channel bits MUX1.4 The multiplex within the CT2 standard containing 64 B channel bits and 4 D channel bits MUX2 The multiplex within the CT2 standard containing 32 D channel bits and 32 SYN channel bits MUX3 The "long" 10 ms burst transmitted by a CT2 handset when trying to establish a call NACK Not Acknowledge - a form of protocol where action is taken if no acknowledgement is received NAFTA North American Free Trade Area - USA, Canada and Mexico NAMPS Narrowband AMPS cellular standard NCHO Network Controlled HandOver NET Norme Européenne de Télécommunications, a type of standard NMT Nordic Mobile Telephone, an analogue cellular standard NPAG North American PCS Advisory Group NTIA National Telecommunications Information Administration (in the USA) NWK/NWL Network Layer, protocol layer O&M Operations and Maintenance OAM Operations, Administration and Maintenance OAM&P Operations, Administration, Maintenance and Provisioning OCDMA Orthogonal CDMA OELR Overall Echo Loudness Rating OFS Operational Fixed Services OFTA Office of the Telecommunications Authority, Hong Kong OFTEL The UK Office of Telecommunications OLR Overall Loudness Rating OSI Open Systems Interconnection - The ISO standard for communications, a seven layer reference model for protocol specification OTAR Over the air registration P&A Privacy and Authentication PA Portable Application or Power Amplifier PABX Private Automatic Branch Exchange PACS Personal Advanced Communication System PACS-UA PACS variant A for the US unlicensed bands, related to PHS PACS-UB PACS variant B for the US unlicensed bands PAP Public Access Profile, of DECT PARK Portable Access Rights Key PBX Same as PABX PCH Paging Channel PCI Personal Communications Interface, US unlicensed standard based on CT2 PCM Pulse Code Modulation PCMCIA Personal Computer Manufacturers' Card Industry Association, a standard for plug-in PC cards, now known also simply as PC Card PCN Personal Communications Network PCS Personal Communications Service PCS1900 US cellular standard, 1900 MHz version of DCS1800 PDA Personal Digital Assistant PDC The Japanese Personal Digital Cellular standard PHL Physical Layer, lowest protocol layer PHS Personal Handyphone System - Japanese cordless standard PIC Personal Intelligent Communicator PINX Private Integrated services Network eXchange PISN Private Integrated Services Network PLL Phase Lock Loop PLMN Public Land Mobile Network PMR Private Mobile Radio PP Portable Part PRA ISDN Primary Rate Access PS Personal Station PSK Phase Shift Keying modulation PSTN Public Switched Telephone Network PT Personal Telecommunications or Portable Termination or Project Team (in ETSI) PTN Personal Telephone Number PTO/PTT Term used to refer to a national telecommunication administration PWT Personal Wireless Telecommunications - US cordless technology, a variant of DECT. PWT(E) PWT (Enhanced) - enhanced version of the PWT technology for operation in the licensed PCS bands QDU Quantisation Distortion Unit QPSK Quadrature Phase Shift Keying modulation QSAFA Quasi-Static Autonomous Frequency Assignment QSIG Inter PABX signalling protocol Quantisation The process of representing samples of an analogue waveform by the nearest whole number of pre-defined voltage steps RACE Research and development in Advanced Communication technologies in Europe, research initiative instigated by the CEC RAP Radio local loop Access Profile of DECT RBOC Regional Bell Operating Company RCR Research & Development Centre for Radio Systems of Japan RES 3 Technical subcommittee, Radio Equipment and Systems 3, of ETSI, responsible for the specification of cordless systems RFI Radio Frequency Interference RFP Radio Fixed Part - same as Cordless Fixed Part RLAN Radio Local Area Network RLL Radio Local Loop RLR Receiving Loudness Rating RP Radio Port RPCU Radio Port Controller Unit RPE-LTP Regular Pulse Excitation - Long Term Predictor, type of LPC speech coding used in the GSM digital cellular radio system RSSI Received Signal Strength Indication SACCH Slow Associated Control Channel SAW Surface Acoustic Wave SBC System Broadcast Channel SCCH Specific Cell Channel SCI Synchronisation, Control and Information SDL System Description Language SDLC Synchronous Data Link Control Sidetone An attenuated component of the speakers voice signal fed back to his own earpiece to provide confidence that the equipment is functional SIM Subscriber Identification Module, of GSM Simplex One way communication SLR Sending Loudness Rating SMS Short Message Service, of GSM SMT Surface Mount Technology SNR Signal to Noise Ratio SoHo Small Office / Home Office SPCS Satellite Personal Communications System SQER Signal-to-Quantising-Error Ratio STMR Side Tone Masking Rating SU Subscriber Unit SYN The channel used in CT2 to allow synchronisation to be established SYNCD Synchronisation pattern used in CT2 SYNCF Synchronisation pattern used in CT2 SYNCP Synchronisation pattern used in CT2 TACS Total Access Communication System - an analogue cellular system, based upon AMPS, the US system TAL Telephone Acoustic Loss TBR Technical Basis for Regulation, a European standard mechanism TCH Traffic Channel TCL Telephone Coupling Loss TDD Time Division Duplex TDM Time Division Multiplex TDMA Time Division Multiple Access TE Terminal Equipment TELR Talker Echo Loudess Rating (nearly the same as OELR) TIA The US Telecommunications Industry Association TIM Telephone Identity Module TRAC Technical Recommendations Applications Committee TTC The Japanese Telecommunication Technology Committee UIC User Information Channel UMC Universal Mobile Communicator UMTS Universal Mobile Telecommunication Service, being standardised by ETSI UNI User Network Interface UPCH User Packet Channel UPCS Unlicensed PCS Uplink The transmission link from the portable part to the fixed part UPT Universal Personal Telecommunications UW Unique Word, used for synchronisation and/or identification across a radio link VCO Voltage Controlled Oscillator VDU Video Display Unit VPN Virtual Private Network WACS Wide Area Communication System, wireless access technology developed by Bellcore, which has formed the basis for PACS WCPE Wireless Customer's Premises Equipment, DECT based standard now referred to as PWT WDCT Worldwide Digital Cordless Telecommunications - a Siemens proprietary digital cordless standard for products marketed in the USA, a derivative of the DECT standard, augmented to operate in the ISM band (2.4 GHz) and to comply with FCC rules. WLAN Wireless Local Area Network WLL Wireless Local Loop WPABX Wireless Private Automatic Branch Exchange WPBX Wireless Private Branch Exchange WRC World Radio Conference, part of the ITU activity, superceding the previous WARC process WRS Wireless Relay Station WUPE Wireless User Premises Equipment |
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