\\ More than 3500 Telecom abbreviations maintained by Ioan (Nini) Indreias // 1 A B C D E F G H I J K L M N O P Q R S T U V W X Y All words 1G The first generation of analogue mobile phone technologies (AMPS, TACS and NMT) 2.5G The enhancement of GSM which includes technologies such as GPRS 2BIQ Two Bits, One Quantenary 2DRMS 2-Dimensional Root Mean Square 2G The second generation of digital mobile phone technologies (GSM, CDMA IS-95 and D-AMPS IS-136) 3G The third generation of mobile phone technologies covered by the ITU IMT-2000 family . . more 1-9 words...(3) A-bis Interface between the BSC and BTS in a GSM network A-TDMA Advanced Time Division Multiple Access A51/2/3/8X Encryption algorithms for GSM networks AA Administrative Authority AA Allocation Area AA Auto Answer . . more A words...(319) B-CDMA Broadband Code Division Multiple Access B-CPE Broadband Customer Premises Equipment B-ICI Broadband ISDN Inter-Carrier Interface B-ICI Broadband ISDN InterCarrier Interface B-ISDN Broadband Integrated Services Digital Network B-ISDN Broadband ISDN . . more B words...(179) C-ISUP Proprietary Cisco protocol based on ISUP C/(N+I) Carrier to Noise plus Interference Ratio C/I Carrier to Interference Ratio C/N Carrier to Noise ratio C/R Command/Response C/R Control/Response Indication Bit . . more C words...(461) D-AMPS Digital AMPS (US wireless standard, IS-136) D-H Diffie-Hellman (algorithm) D-WDM Dense-Wavelength Division Multiplexing D/I Drop and Insert D3 Third generation channel bank (24 chans on T1) D4 Fourth generation channel bank (48 voice chans on 2 T1's or 1 T-1C) . . more D words...(307) E&M Ear and Mouth EA Address field Extension (HDLC) EA Equal Access EA Extended Address EAD Expedited Application Docket EADAS Engineering and Administration Data Acquisition System . . more E words...(174) FA Favourite Area FABS Flexible Automated Billing System FACCH Fast ACCH (GSM) FACS Facility Assignment and Control System FAQ Frequently Asked Question FAS Frame Alignment Sequence (T-1) . . more F words...(165) G/T Gain to Thermal noise G Giga G Giga- GAAP Generally Accepted Accounting Principles GAP Generic Access Parameter GAP Generic Access Profile (DECT) . . more G words...(77) H Header HA High Availability HAC Hands-Free Add-On Circuit HCDS High Capacity Data Services HCDS High Capacity Digital Services HCM High Capacity Multiplexing . . more H words...(91) I&R Installation and Repair I/O Input and Output IA5 International Alphabet #5 (ITU-T) IAA Initial Address Acknowledgement IAB Internet Advisory Board IAB Internet Architecture Board (formerly Activities) . . more I words...(262) JAIN JAVA APIs for Integrated Networks JIS Jurisdictional Interstate Service JIT Just in Time JPEG Joint Photographic Experts Group JPEG Joint Photographic Experts Group (ISO) JRE Java Runtime Environment . . more J words...(5) K Kilo- KBPS / KB/s KiloBits Per Second KBPS KiloBits Per Second KCPS KiloCycles Per Second KHZ KiloHertZ KM KiloMeter . . more K words...(4) LAA Longest Available Agent LAC Location Area Code LAC Location Area Code (GSM - UMTS) LAC Loop Assignment Center LADS Local Area Data Service LADT Local Area Data Transport . . more L words...(176) M&P Methods & Procedures M2UA MTP3 User-Adaptation Layer M3UA MTP2 User-Adaptation Layer M Mega M Modem MA Maintenance Administrator . . more M words...(217) N-AMPS Narrowband AMPS NA-TDMA North American Time Division Multiple Access NA Numerical Aperture NAA Next Available Agent NAA Number Assignment Administration NABER National Association of Business and Educational Radio . . more N words...(174) O&M Operation and Maintenance OA&M Operation, Administration and Maintenace OA Operator Assistance OACSU Off-air Call Setup (GSM) OADM Optical Add-Drop Multiplexer OAI Open Access Interconnection . . more O words...(121) P/AR Peak to Average Ratio P/F Poll/Final Bit P2P Peer-To-Peer PA Pointer Adjustment PA Preamble (LAN) PA PreArbitrated . . more P words...(230) QA Quality Assurance QA Queue Arbitrated QAM Quadature Amplitude Modulation QAM Quadrature Amplitude Modulation QAPSK Quadrature Amplitude Phase Shift Keying QASPR QUALCOMM Automatic Satellite Position Reporting . . more Q words...(17) R5 Release 5 of the 3GPP standards (GSM - UMTS) R6 Release 6 of the 3GPP standards R Ring R Router RAC Real Application Cluster RAC Real Application Cluster (Database) . . more R words...(196) S&E Service & Equipment S< Speech and Language Technology S-CDMA Synchronous CDMA S-PCN Satellite Personal Communication Networks S/N Signal to Noise Ratio S7AP SS7 Application Part . . more S words...(452) T-1 DS-1 digital system T Tip TA Terminal Adapter TA Terminal Adapter (ISDN) TA Timing Advance TA Timing Advance (GSM - UMTS) . . more T words...(231) UA Unbalanced Asynchronous (HDLC) UA Unnumbered Acknowledgement (HDLC) UA User Agent UAN User Access Node UARFCN UTRA Absolute Radio Channel Frequency Number (GSM - UMTS) UART Universal Asynchronous Receiver Transmitter . . more U words...(84) VAD Voice Activated Dialing VAD Voice Activity Detector (GSM) VAN Value Added Network VAN Value-Added Network VANC Voice Activated Network Control VANS Value Added Network Service . . more V words...(121) W-CDMA Wideband-CDMA W-DCS Wideband Digital Crossconnect System W3C World Wide Web Consortium WA Work Area WACK Wait Acknowledgement (BISYNC) WACS Wireless Access Communications System . . more W words...(56) XA-FR Exchange Access Frame Relay XA-SMDS Exchange Access Switched Multi-megabit Data Service XA Exchange Access (SMDS) XAME eXchange Access Mapping Entity XAPIA X.400 API Association XBAR cross BAR switch . . more X words...(17) YP Yellow Pages . . ZBTS Zero Byte Time Slot ZBTSI Zero Byte Time Slot Interchange ZCS Zero Code Suppression ZIP Zone Information Protocol (AppleTalk) ZIS Zone Information Socket ZIT Zone Information Table . . more Z words...(1) SMBZ - SaMBoZaur - test for propagation of define: