The 2600 Information Bureau

Acronym List

List compiled and typed by The Shadow, mostly from Bell and AT&T documents collected while trashing, so climb on in!!

Thanks for help with acquiring these acronyms and abbreviations goes to 2600 Magazine, BIOC Agent 003, Agrajag the Prolonged, the Anti-Christ, ARPA.Telcom, AT&T Communications, AT&T Information Systems, Bell Communications Research, Bell Laboratories, Bruce E. Brilley, Broadway Hacker, C&P Bell, Dimitris N. Chorafas, Colonel Hogan, the Courier, Headrush, ITT, A. E. Joel, the Kid & Co., King Blotto, Lex Luthor, New Jersey Bell, the Monitor, Fred Steinbeck, Mark Tabas, TAP Magazine, Toronto Phreak, Wiz Kid, and all the members of the Private Sector as well as the underground network of fellow telecommunications hobbyists.

a

A ABHC - Average Busy Hour Calls ABV - Attendant Busy Verification ACD - Automatic Call Distribution System ACS - Advanced Communications System ACTS - Automatic Coin Telephone Service ACU - Alarm Control Unit ADCI - Automatic Display Call Indicator ADP - Advanced Data Processing AVS - Automatic Voice System ADX - Asymmetric Data Exchange AFADS - Automatic Force Adjustment Data System AIC - Automatic Intercept Center AIOD - Automatic Identification Outward Dialing AIS - Automatic Intercept System AMA - Automatic Message Accounting AMARC - Automatic Message Accounting Recording Center AMPS - Advanced Mobile Telephone Service ANC - All Number Calling ANF - Automatic Number Forwarding ANI - Automatic Number Identification AP - All Points ARPANET - Advanced Research Projects Agency Network ARQ - Automatic Repeat Request ATA - Automatic Trouble Analysis ATM - Automatic Teller Machine ATR - Alternate Trunk Routing ATT - American Telephone and Telegraph ATTIS - American Telephone and Telegraph Information Systems AUTOVON - Automatic Voice Network AUTODIN - Automatic Digital Network B BCP - Byte Controlled Protocols BDT - Billing Data Transmitter BELLCORE - Bell Communications Research BHC - Busy Hour Calls (Peak) BICS - Building Industry Consulting Services BIOC - Break Into Other Computers BIS - Business Information System BLF - Busy Line Field BO - Busy Override BOC - Bell Operating Company BORSCHT - Battery, Overvoltage, Ringing ,Supervision, Coding, Hybrid, and Testing (No, I didn't make this one up.) BOS - Business Office Supervisor BPOC - Bell Point of Contact BSC - Binary Synchronous Communication BSI - Business Service Instructor BSP - Bell System Practices BTL - Bell Telephone Laboratories C CAMA - Centralized Automatic Message Accounting CBS - Crossbar Switching CC - Country Code CCCF - Central Cross Connect Field CCI - Computer Carrier Interrupt CCIS - Common Channel Interoffice Signaling CCITT - International Telephone and Telegraph Consultative Committee (in French) CCS - Centa (100) Call Seconds per Hour CCSA - Common Control Switching Arrangement CDA - Call Data Accumulator CDO - Community Dial Office CEVI - Common Equipment Voltage Indicator CF - Coin First (Payphone) CICS - Customer Information Control System CLS - Combined Line and Recording CLRC - Circuit Layout Record Card CMD - Centralized Message Distribution CMS - Circuit Maintenance System CNA - Customer Name and Address CO - Central Office COAM - Company Operated and Maintained Network COER - Central Office Equipment Report COMAS - Central Office Maintenance and Administration System COS - Class of Service COSMIC - Common System Main Interconnecting Frame COSMOS - Computer System for Main Frame Operations CPE - Customer Premises Equipment CREG - Concentrated Range Extension with Gain CSACS - Centralized Status, Alarm and Control System CSDC - Circuit Switched Digital Capability CSL - Coin Supervising Link CSMA - Carrier Sense Multiple Access CSO - Central Services Organization CSP - Control Switching Point CSS - Customer Switching System CUG - Closed User Group CUVI - Common Unit Voltage Indicator D DA - Directory Assistance DA/C - Directory Assistance/Computerized DA/M - Directory Assistance/Microfilm DACS - Digital Access Cross-Connect System DAV - Digital Over Voice DAVID - Digital Over Video DCE - Data Communications Equipment DCTS - Dimension Custom Telephone Service DDD - Direct Distance Dialing DDS - Dataphone Digital Service DDX - Distributed Data Exchange DIAD - (magnetic) Drum Information Assembler / Dispatcher DAIS - Defense Automatic Integrated System DID - Direct Inward Dialing ­ DIS - Distributed Information System DIV - Data In Voice DLL - Dial Long Line Equipment DN - Directory Number DNHR - Dynamic Non-Hierarchical Routing DNR - Dialed Number Recorder DNIC - Data Network Identification Code DOC - Dynamic Overload Control DP - Dial Pulse DRE - Directional Reservation Equipment DSA - Dial System Assistance DSS - Direct Station Selection (or Digital Switching System) DTE - Data Terminating Equipment DTF - Dial Tone First (Payphone) DTS - Direct Trunk Group DTMF - Dual-Tone Multi-Frequency DTS - Domestic Transmission System DUV - Data Under Voice DV - Destination Vocoder DVX - Digital Voice Exchange E EADASS - Engineering and Administrative Data Acquisition System EAS - Extended Area Service (or Engineering Administration System) EBCDIC - Extended Binary-Coded Decimal Interchange Code ECASS - Electronically Controlled Automatic Switching System ECDO - Electronic Community Dial Office ECO - Electronic Central Office ECS - Electronic Communications Systems EDTCC - Electronic Data Transmission Central Communications EFT - Electronic Funds Transfer EMN - End Marked Network EMS - Electronic Message System EO - End Office EOTT - End Office Toll Trunking ESAC - Electronic Systems Assistance Center ESAD - Equal Access Service Date ESB - Emergency Service Bureau (911 exchange) ESS - Electronic Switching System ESSEX - Experimental Solid-State Exchange ETFD - Electronic Toll Fraud Device ETS - Electronic Translation System EVX - Electronic Voice Exchange F FACD - Foreign Area Customer Dialing FAN - Full Access Network FAT - Foreign Area Translation FDM - Frequency Division Multiplexing FFS - Freeze Frame Systems FRU - Field Replaceable Units FSP - Frequency Shift Pulsing FTG - Final Trunk Group FTS - Federal Telephone System FX - Foreign Exchange G GTE - General Telephone Electronics H HACD - Home Area Customer Dialing HDLC - High Level Data Link Control HNPA - Home Numbering Plan Area HOBIS - Hotel Billing Information System HUTG - High Usage Trunk Group I IDDD - International Direct Distance Dialing IDF - Intermediate Distribution Frame IIS - Integrated Information System INWATS - Inward Wide Area Telephone Service INADS - Initialization and Administration System IOCC - International Overseas Completion Center IOD - Identified Outward Dialing IP - Intermediate Point ISC - International Switching Center ISIS - International Switched Interface System ITU - International Telecommunications Union J JIM - Job Information Memorandum K KDCI - Key Display Call Indicator KP - Key Pulse KSU - Key Service Unit KTS - Key Telephone System KTU - Key Telephone Unit L LAMA - Local Automatic Message Accounting LAMA/C - Local Automatic Message Accounting/Computerized LAN - Local Area Network LCC - Lost Calls Cleared LCD - Lost Calls Delayed LCH - Lost Calls Held LDD - Local Digital Distribution LDM - Limited Distance Modem LDS - Long-Distance Service LDX - Long-Distance Extender LIU - Line Interface Unit LL - Long Lines LLN - Line Link Network LLP ­- Line Link Pulsing LMOS - Line Maintenance Operations System LSS - Loop Switching System M MAAP - Maintenance and Administration Pane! MCC - Master Control Console MCI - Microwave Communications Incorporated MDAS - Magnetic Drum Auxiliary Sender MDF - Main Distribution Frame MF - Multi-Frequency MFT - Metallic Facility Frame MILNET - Military Network MTBF - Mean Time Between Failure MTR - Magnetic Tape Recording MTSO - Mobile Telephone Switching Office N NBO - Network Build Out NCA - Network Control Analysis NOTIS - Network Operator Trouble Information System NPA - Number Plan Area NPDA - Network Problem Determination Application NPDN - Nordic Public Data Network NSN - No Such Number O OCI - Out of City Indicator ODD - Operator Distance Dialing OIS - Office Information System OIU - Office Interface Unit ONI - Operator Number Identification OR - Originating Register OSI - Open System Interconnection OSS - Operation Support System OUTWATS - Outward Wide Area Telephone Service OW - Order Wire P PABX - Private Automatic Branch Exchange PAM - Pulse-Amplitude modulation PATROL - Program for Administrative Traffic Reports On Line PBX - Private Branch Exchange PC - Primary Center PCI - Panel Call Indicator PCM - Pulse-Code Modulation PLTV - Phone Line Television POS - Point of Sale POTS - Plain Old Telephone Service PP - Primary Point (or Post Pay Payphone) PPCS - Person-to-Person Collect, Special PPM - Pulse-Position Modulation PPN - Project Programmer Number PSDS - Public Switched Digital Service PSW - Public Switching Network PTT - Postal, Telephone, and Telegraph Authorities (European) PVPR - Packet Voice Over Packet Radio PWM - Pulse-Width Modulation Q QRSS - Quasi-Random Signal Source R RACEP - Random Access and Correlation for Extended Performance RASC - Residence Account Service Center RC - Regional Center RCC - Radio Common Carrier RET - Real Enough Time RJE - Remote Job Entry RMATS - Remote Maintenance Administration and Traffic System ROTL - Remote Office Test Line ROTS - Rotary Out Trucks Selector RP - Revertive Pulse RQS - Rate Quote System RR - Route Relay RRO - Rate and Route Operator RSS - Remote Switching System RSU - Remote Switching Unit RT - Real Time RTA - Remote Trunk Arrangement RTAC - Regional Technical Assistance Center RU - Receive Unit S SA - Service Assistant SAC - Special Area Code SAMA - Step-by-Step Automatic Message Accounting SARTS - Switched Access Remote Test System SBS - Skyline Business Systems SC - Sectional Center SCAN - Switched Circuit Automatic Network SCC - Switching Control Center (or Specialized Common Carriers or Satellite Communications Controller) SCOTS - Surveillance and Control Of Transmission Systems SCPC - Single Channel Per Carrier SDCU - Satellite Delay Compensation Unit SDDS - Switched Digital Data Service SDLC - Synchronous Data Link Control SDM - Space-Division Multiplexing SDX - Satellite Data Exchange SF - Single Frequency SLN - Service Link Network SNA - Systems Network Architecture SOTUS - Sequentially-Operated Teletypewriter Universal Selector SPADE - Simple Channel Per Carrier Assignment by Demand Equipment SPC - Stored Program Control SRCC - Simplex Remote Communications Central SSB - Single-Side Band SSTDMA - Spacecraft Switched Time-Division Multiple Access (theoretical) STP - Signal Transfer Point STS - Space-Time-Space Switching Architecture SV - Source Vocoder SXS - Step-by-Step Switching Equipment T TAC - Technical Assistance Center TACACS - TAC Access Control System TAP - Technological American Party (or Technical Assistance Program) TASC - Telecommunications Alarm Surveillance and Control System TASI - Time Assignment Speech Interpolation TC - Toll Center (or Teleconferencing) TCE - Telephone Company Engineered TCT - Test and Code Treatment Frame TDD - Telecommunications Device for the Deaf TDM - Time-Division Multiplexing TDMA/DA - Time-Division Multiple Access/Demand Assignment TDRS - Traffic Recording System TEARS - Traffic Engineering for Automatic Route Selection TELCO - Telephone Company TELSAM - Telephone Service Attitude Measurement TG - Trunk Guard TGUE - Trunk Group Usage Equipment TLN - Trunk Link Network TLP - Test Level Point TM - Terminal Management TMS - Time Multiplexed Switch TN - Telephone Number (or Telenorm) TNDS - Total Network Data System TNDP - Total Network Operations Plan TOC - Trunk Operating Center TORC - Traffic Overload Reroute Control TP - Toll Point TPU - Trunk Processing Unit TS - Time Sharing TSI - Time Slot Interchange TSPS - Traffic Service Position System TTY - Teletypewriter TU - Transmit Unit TUR - Traffic Usage Recorder TWX - Teletypewriter Network U UNICOM - Universal Integrated Communications System USOC - Uniform Service Order Code USP - Usage Sensitive Pricing UT - Universal Trunk V VAC - Value Added Carrier VAN - Value Added Network VF BSY - Verify Busy VMS - Voice Message System VMX - Voice Message Exchange VSS - Voice Storage Service W WATS - Wide Area Telephone Service WC - Wire Center WO - Work Order WORD - Work Order Record and Details X XBAR - Crossbar Switching Equipment Y YIPL - Youth International Party Line