=============================================================================== _ _ _______ | \/ | / _____/ |_||_|etal / /hop __________/ / /___________/ (314)432-0756 Proudly Presents The MCI Telecommunications Glossary Part II: Acronyms Typed and edited by Knight Lightning =============================================================================== - A - ACD Automatic Call Distributor AIOD Automatic Identification of Outward Dialing ANI Automatic Number Identification ARS Automatic Route Selection ASCII American Standard Code for Information Interchange ATB All Trunks Busy AVD Alternate Voice Data - B - BOC Bell Operating Company BSOC Bell System Operating Company BPS Bits Per Second - C - CCIS Common Channel Interoffice Signaling CCSA Common Control Switching Arrangement CO Central Office COAM Customer Owned And Maintained COS Class Of Service CPE Customer Premise Equipment CPH Cost Per Hour CPM Cost Per Minute CPU Central Processing Unit CRT Cathode Ray Tube CU Control Unit - D - dB Decibel DCTS Dimension Custom Telephone Service DDD Direct Distance Dialing DID Direct Inward Dialing DM Delta Modulation DTMF Dual Tone Multi-Frequency - E - EDP Electronic Data Processing EEHO Either End Hop Off EKTS Electronic Key Telephone Set EML Expected Measured Loss ENFIA Exchange Network Facilities for Interstate Access EPROM Erasable Programmable Read Only Memory EPSCS Enhanced Private Switched Communication Service ERL Echo Return Loss ETN Electronic Tandem Network - F - FCC Federal Communications Commission FDM Frequency Division Multiplex FX Foreign Exchange - H - HEHO Head End Hop Off Hz Hertz - I - IMT Inter-Machine Trunk IOT Inter-Office Trunk IRC International Record Carrier - L - LAN Local Area Network LATA Local Access and Transport Area LCR Least Cost Routing - M - MDF Main Distribution Frame MERS Most Economical Route Selection MG Mastergroup MOS Metal-Oxide Semiconductor MTS Message Telephone Service MU Message Unit M/W Microwave - N - NPA Numbering Plan Area NNX Numbering Network Exchange - O - OCC Other Common Carrier ONAL Off Network Access Line OPX Off-Premise Extension - P - PABX Private Automatic Branch Exchange PBX Private Branch Exchange PCM Pulse Code Modulation POTS Plain Old Telephone Service PROM Programmable Read-Only Memory PSC Public Service Commission PSN Public Switched Network PTT Postal Telephone and Telegraph PUC Public Utility Commision - R - RAM Random Access Memory RCC Radio Common Carrier ROM Read-Only Memory - S - SCC Specialized Common Carrier SG Supergroup SMDR Station Message Detail Recording SMG Supermastergroup SPC Stored Program Control SSB Single Sideband Radio - T - TEHO Tail End Hop Off TDM Time Division Multiplex TMRS Traffic Measurement and Recording system TSPS Traffic Service Position System TT Trunk Type TTTN Tandem Tie Trunk network TUR Trunk Utilization Report TWX Teletypewriter Exchange Service - U - UCD Uniform Call Distributor USOC Uniform Service Order Code - V - VANS Value - Added Network Service VP Voice Frequency VGF Voice Grade Facility VNL Via Net Loss - W - WATS Wide Area Telecommunications Service =============================================================================== This concludes The MCI Telecommunications Glossary. Look for more G-philes on MCI by Knight Lightning coming soon to Metal Shop. This has been a 2600 Club production Thanx to Taran King