// TAR - Telco Acronym Reference // // by dual_parallel // // http://www.oldskoolphreak.com The current state of telco paranoia has come to the point where telcos kick their own line technicians out of the COs, only to have them base their operations out of "construction yards." Telcos also try to obfuscate operational information by creating acronyms from their own specialized technical terms (jargon). The following up-to-date acronym reference was created to aid the community in learning about the technology we desire to know and the information not meant to be free. 5ESS - #5 Electronic Switching System AABS-APS - Automated Alternate Billing Services-Automated Position System AAC - Alarm Conversion Circuit AAL - ATM Adaptation Layer ACD - Automated Call Distributor ACE - ATM Circuit Emulation ACQS - Automated Charge Quotation Services ACTS - Automated Coin Toll Service ADAS - Automated Directory Assistance System ADSL - Asymmetrical Digital Subscriber Line AFM - ATM Feed Multiplexer AIN - Advanced Intelligent Network AIU - Access Interface Unit ALI - Automatic Location Identification AM - Administrative Module AMA - Automatic Message Accounting AMLB - Automated Muti Leaf Bulletin ANAC - Automated Number Announcement ANAC - Automatic Number Announcement Circuit ANI - Automatic Number Identificaiton ANI - Automatic Number Identifier APPRC - Application Recent Change APS - Automated Position System ARU - Audio Response Unit ASCII - American Standard Code for Information Interchange ASM - Administrative Service Module ASP - Advanced Services Platform AT - Administrative Terminal A-TA - Asynchronous-Terminal Adapter ATA - Automated/Automatic Trouble Analysis (OSS-network) ATM - Asynchronous Transfer Mode ATMI - ATM Interface Unit BAF - Bellcore AMA Format BAIU - Broadband Access Interface Unit BICC - Bearer Independent Call Control BLNA - Busy Line No Answer BLV - Busy Line Verification BMI - Begin Managed Introduction BRCS - Business and Residence Custom Services BRI - Basic Rate Interface BST - Basic Service Terminal BVA - Billing Validation Application BW - Bandwidth CALEA - Communication Assistance to Law Enforcement Act CAMA - Centralized Automatic Message Accounting CAP - Carrierless Amplitude and Phase CAPIS - Customer Accessible Product Information System CAS - Customer Account Services CCC - Call Content Channel CCC - Commercial Credit Card CCI - Computer Consoles Incorporated CCIS6 - Common Channel Interoffice Signaling System Number 6 CCITT - International Telegraph and Telephone Consultative CCQS - Centralized Charge Quotation Service CCRS - Bellcore Customer Change Reuqest System CCS - Common Channel Signaling CDC - Call Data Channel CDMA - Code Division Multiple Access CDP - Custom Dialing Plan CDPD - Cellular Digital Packet Data CDX - Compact Digital Switch CFR - Centralized Flexible Rating CFV - Call Fowarding Variable CI2 - Control Interface 2 CIC - Carrier Identification Code CID - Caller ID CID - Carrier ID CLASS - Customer Local Area Signal System CLEC - Competitive Local Exchange Carrier CLLI - Common Language Location Identification CM - Communications Module CMC - Cellular Mobile Carrier CMP - Communication Module Processor CMT - CCS Message Transport CNA - Connecting Network Access CNA - Customer Name Address CNI - Change Number Intercept CNI - Common Network Interface CO - Central Office COMDAC - COMmon Data And Control Circuit CORE40 - MC68040 based processor CORE60 - MC68060 based processor COS - Class Of Service CPE - Customer Premise Equipment CSD - Circuit Switched Data CSS - Cluster Support System CSV - Circuit Switched Voice CTI - Computer Telephone Integration DA - Directory Assistance DA/LS - Directory Assistance/Listing Service DAA - Directory Assistance Automation DACC - Directory Assistance Call Completion DACS/C - Directory Assistance System Computer DAL - Data Access Line DAL - Direct Access Link DAS - Digit Analysis Selector DF2 - Data Fanout 2 DCI - DSCh Computer Interconnect DCLU - Digital Carrier Line Unit DCPPU - Direct Current Power Protection Unit DCS - Digital Cellular Switch DDM - Dual Digtal Multiplexer DDS - Digital Data Service DID - Direct Inward Dial DII - Direct Intelligent Interface DIOR - Direct International Orginations DLC - Digital Loop Carrier DLTU - Digtial Line Trunk Unit DMT - Discrete Multi-Tone DN - Directory Number DNT - Dialed Number Trigger DNU - Digital Network Unit DNU-S - Digital Networking Unit-SONET DOJ - Department of Justice DOPS - Digital Ordering and Planning System DRM - Distinctive Remote Module DS-0 - Digital Signal Level 0 (1 Channel/64 Kbps) DSCh - Dual Serial Channel DSL - Digital Subscriber Line DSLAM - Digital Subscriber Line Access Multiplexer DSU2-RAF - Digital Subscriber Unit 2-Recorded Announcement Function DTMF - Dual Tone Multi Frequency EADAS - Engineering and Administrative Data Acquisition System EAIU - Expanded Access Interface Unit EAS - Extended Area Service EC - Echo Cancellation ECD - Equipment Configuration Database ECP - Engineering Change Procedure EDU - External Disk Unit EIS - External Information System EM - Element Management EMS - Element Management System EOTAS - External Operator Trouble Report Analysis System ESA - Emergency Service Adjunct ESN - Emergency Service Number EVRC - Enhanced Variable Rate Coding EXM2000 - Extended Module 2000 FACR - Feature Activation Counting & Reconciliation FCA - Fully Coded Addressing FCCS - Foward Call-Call Screening FCI - Foward Call Indicator FDMA - Frequency Division Multiple Access FEP - Front End Process FFA - First Feature Applicaiotn FGD - Feature Group D FMC - Force Management Center FMO - Future Mode of Operation FMSI - Force Management System Interface FR - Frame Relay GAP - Generic Address Parameter GMB - Group Make Busy GSM - Global System for Mobile Communications HDSL - High bit-rate DSL HOBIC - Hotel Billing Information Center HOBIS - Hotel Billing Information Service HSM - Host Switching Module IAM - Initial Address Message ICC - Illinois Commerce Commission IDDD - International Direct Distance Dialing ILEC - Independent Local Exchange Carrier IN - Intelligent Network IP - Intelligent Peripheral ISAS - ISDN Smart Attendant Services ISDN - Integrated Services Digital Network ISLU - Integrated Services Line Unit ISP - Intermediate Switching Point ISP - Internet Service Provider ISUP - ISDN User Part ISVM - Interswitch Voice Messaging iVTOA - Integrated Voice Telephony Over ATM IXC - Interexchange Carrier JIP - Jurisdiciton Information Parameters Kbps - Kilobits per second LAG - Line Access Gateway LASS - Local Area Signaling Services LATA - Local Access and Transport Area LCC - Line Class Code LD - Long Distance LDAP - Lightweight Directory Access Protocol LDIT - Local Digit Interpreter Table LDP - Long Distance Platform LDSU - Local Digital Service Unit LEA - Law Enforcement Agency LEC - Local Exchange Carrier LERG - Local Exchange Routing Guide LIDB - Line Information Data Base LNP - Local Number Portability LRN - Local Routing Number LS - Listing Service LSDB - Listing Services Data Base LSPI - Local Service Provider Identificaiton LTD - Local Test Desk LTS - Loop Test System LTSB - Line Time Slot Bridging LU - Line Unit MARCH - Bellcore System for end office service requests MBG - Multiswitch Business Group Mbps - Megabits per second MCC - Master Control Center MDBA - Multiple Data Base Access MDF - Main Distruting Frame MDN - Mobile Directory Number MECH - More Efficient Call Handling MF - Multi-Frequency MFFU - Modular Fuse and Filter Unit MHD - Moving Head Disk MLPP - MultiLevel Precedence and Preemption MM - Multi-Media MMB - Member Make Busy MMRSM - Multi-Module Remote Switching Module MMSU - Modular Metallic Service Unit MP - Modem Pool MSA - Metro Service Area MSC - Mobile Switching Center MTB - Metallic Test Bus MUX - MUltipleX MWI - Message Wating Indicator NAES - Network Administration and Engineering Support group NAI - Network Access Interrupt NCT - Network Control and Timing NEBS - National Electrical Building Standards NEBS - New Equipment and Building Standards NEL - Next Event List NI-2 - Network Interconnect NM - Network Management NOTIS - Network Operator Trouble Information System NP - Number Portability NPA - Number Portability Area NPA - Numbering Plan Area NPV - Net Present Value NRC - Network Reliability Center NRPM - Notice of Proposal Rule Making NSC - Network Software Center NT - Network Termination NTP - NetMinder NXX - Office code OA&M - Operations, Administration, and Maintenance OAP - OSPS Adminstrative Processor OC-1 - Optical Carrier-1 ODBE - Office Data Base Editor ODD - Office Dependent Data OHD - Off-Hook Delay OIU - Optical Interface Unit OLS - Originating Line Screening OMP - Operations Maintenance Platform ORDB - Operator Reference Data Base ORM - Optically Remote Terminal OS - Operating System OSDE - On-Site Data Evolution OSPS - Operator Services Position System OTO - Office-To-Office OTR - Operator Trouble Reports OWS - OSPS Operator Services Workstation OXU - Optical Transmission Unit PCM - Pulse Code Modulation PCS - Personal Communications Services PCT - Peripheral Control and Timing PCTFI - Peripheral Control and Timing Facility Interface PDC - Packet Data Channel PDS 3.0 - Packet Driver Solution 3.0 PF - Private Facility PH - Packet Handler PH - Protocol Handler PHV - Protocol Handler for Voice PIDB - Peripheral Interface Data Bus PLI - Peripheral Link Interface PLTU - PCT Line and Trunk Unit PMO - Present Mode of Operation PO - Peripheral Optioning PPP - Point-to-Point Protocol PRI - Primary Rate Interface PSAP - Public Safety Answering Point PSDI - Pin Service Denial Indicator PSM - Position Switching Module PSTN - Public Switched Telephone Network PSU - Packet Switch Unit PVC - Permanent Virtual Circuit QoR - Query on Release QPH - Quad-link Protocal Handler QSS - Quote Support System RADSL - Rate-Adaptive Digital Subscriber Line RAF - Recorded Announcement Function RAO - Revenue Accounitng Office RaP - Record and Playback RAS - Remote Access Server RAS - Remote Access Service RASM - Recorded Announcement Systems Manager RBOC - Regional Bell Operating Company RC - Recent Change RCMAC - Recent Change Memory Administration Center RC/V - Recent Change/Verify REX - Routine Exercise RFA - Receive Frame Area RISLU - Remote ISDN Line Unit RN - Ring Node ROP - Read Only Printer RSD - Rapid Software Delivery RSM - Remote Switch Module RT - Remote Terminal RTBM - Real-Time Billing Memory RTCD - Real-Time Call Detail RTRS - Real-Time Rating System RTU - Right-To-Use SABM - Stand-Alone Billing Memory SAS - Security Administration System SAS - Security Announcement System SCC - Switching Control Center SCE - Service Creation Environment SCE - Signal Conversion Electronics SCN - Service Circiut Node SCP - Service Control Point SEI - Switch Engineering Information SG-SS7 - 7R/E Signaling Gateway-SS7 SH - Stop Hunt busy SLC - Subscriber Loop Carrier SM - Switch Module SM-2000 - Switching Module-2000 SMC - Switch Module Control SMDS - Switched Multimegabit Digital Service SMF - Single Mode Fiber SMP - Switching Module Processor SMS - Service Management System SMSI - Simplified Message Service Interface SODD - Static Office Dependent Data SONET - Synchronous Optical NETwork SPID - Service Profile Indicator SPs - Service Providers SQL - Standardized Query Language SS7 - Signaling System Number 7 SSP - Service Switching Point STLWS - Supplementary Trunk-Line Work Station STP - Signal Transfer Point STS - Synchronous Transport Signals STS-1 - Synchronous Transport Signal Level 1 (672 Channels/51.840 Mbps) SU - Software Update SVC - Swithced Virtual Circuit T&A - Toll and Assistance TAPI - Telecomminucation Application Programming Interface TCAP - Transaction Capabilities Application Part TCP-IP - Transmission Control Protocol-Internet Protocol TCS - Terminating Code Screening TDMA - Time Division Muiple Access TDMS - Transmission Distortion Measuring Set TIRKS - Trunk Integrated Record Keeping System Title III - US Code - Title III TMS - Time Multiplexed Switch TNM - Total Network Management System (OSS-network) TR - Operator Trouble Reports TRCU - Transmission Rate Converter Unit TRCU3 - Transmission Rate Converter Unit 3 TSICNTL - Time Slot Interchange Control TSICOM - Time Slot Interchange Common board TSMS - Telephone Status Monitor and Select TSP - Telephone Service Provider UNI - User-Network Interface USB - Universal Serial Bus UUCP - UNIX to UNIX Copy VCDX - Very Compact Digital Switch VCP - Visual Call Pickup VDT - Video Display Terminal VRCP - Voice Recognition Call Processing WDLC - Wireless Digital Loop Carrier XAIU - MultipleX Access Interface Unit XAT - X.25 Protocol Over T1 Facility Shout Outs: C4 and the DDP