The Telephony Acronyms and Abbreviations List from Hell 15M Fifteen minutes 15S Fifteen seconds 1CF Singal party coing first pay phone 1FAC Interface packs 1FB One party flat business rate 1OF One party official (telco) business line 2SPDT Partial dial timeout in the second stage of a traditional 2-stage international 2SPST Permanent signal timeout in the second stage of a traditional 2-stage international 2SVCA Vacant code in the second stage of a traditional 2-stage international outbound 2W Two wire (pair) (circuit) 2WAY Two-way trunk groups 300 Log command menu (SARTS command) 376 Log clear (SARTS command) 384 Write log (SARTS command) 385 Read log (SARTS command) 399 Log print (SARTS command) 3KHZ Three kilohertz 3RNGR Three ringer 3WO Third wire open 4W Four wire (pair) (circuit) 600 Test menu (SARTS command) 600B 600-ohm briged connection 611 Detail tests (SARTS command) 621 Macro command menu (SARTS command) 631 Automatic test command (SARTS command) 735T 735-ohm compromise termination ?A Action field contains an error ?D Data field contains an error ?E Error exist in the message but can ot be resolved to the proper field ?I Identification field contains an error ?T Time-out has occured on channel ?W Warning message A A side (lead) (pair) A Area A Telephone number or trunk group and member number from trouble A/B Two wire phone connection (T&R) AA Automatic answer AA Packet analog access line INTER/TRA blocal 1-26 AABS Automatic alternate billing service AAE Auxiliary access equipment AAR Automatic alternate routing AAX Automated attendant exchange AB Packet switch trunk INTER/TRA blocal 1-26 ABATS Automatic bit access test system ABATS Automatic bit access test system (DDS service) ABC Automatic bill calling (TSPS) ABF Abandon failure ABF Abandon failure (MDII) ABHC Average busy hour calls ABL Auxiliary Buffer oder word Left half ABM Asynchronous balanced mode ( -> SABME) ABME ABM extended ABR Auxiliary Buffer order word Right half ABS Alternate billing service ABS Alternative billing service ABSBH Average busy season busy hour ABT Abort ABV Above AC Administrative computer AC Alternating current AC Assembly code ACA Asynchronous communication adapter ACB Annoyance call bureau ACB Automatic call-back ACC Audio communications controller ACCS Automated calling card service ACD Automatic call distribution ACD Automatic call distributor ACDA Automatic call disposition analyzer ACDN Access Directory Number ACDN Access directory number ACE Assignment change establish ACE Automatic calling equipment ACES Aris cabs entry system ACF Advanced communications functions ACFA Advanced CMOS frame aligner peb2030 ACG Automatic call gap ACH Attempt per circuit per hour ACI Answer controller interface (IOM2 monitor command) ACIA Asynchronous communications interface adapter ACK Acknowledge ACK No acknowledgement wink ACK No acknowledgement wink (MDII) ACKDB Acknowledgement database ACM Address complete msg. (SS7: in ISUP) ACOF Attendant control of facilities ACP Action point ACSE Association control service element ACSNET Acedemic computing services network ACSR Automatic customer station rearrangement ACSU Advanced T-1 channel service unit ACT AC Testing definition ACT AC testing definition ACT Activate ACT Active ACT Auto or automatic circuit transactions ACTS Automated coin toll service ACTV Acticated ACTVD Activated ACU Alarm control unit ACU Automatic calling unit AD Attendant INTER/TRA blocal 1-26 ADAP Audix data acquisition package ADAS Advanced directory assistance system ADC American digital cellular ADC Analog to digital converter ADCCP Advanced data communication controll procedure ADCCP Advanced data communications control procedure ADCI Automatic display call indicator ADD EXP Address expander ADDL Additional ADDR Address translations ADJ Ajust ADM Add-drop multiplex ADMA Advanced DMA controller SAB82258 ADN Abbreviated dialing number ADP Automatic diagnostic process. ADPCM Adaptive PCM ADS Administration of designed services ADS Administration of designed services review ADS Advanced digital system ADS Audio distribution system ADS Auxilary data system ADSL Asymmetrical digital subscriber line ADTS Automated digital terminal system ADTS Automatic data test system ADTS Automatic digital terminal system ADU Automatic dialing unit AERM Alignment error rate monitor AF Commercial audio fulltime INTER/TRA blocal 1-26 AFACTS Automatic facilities test system AFADS Automatic force adjustment data system AFE Analog front end AFI Authority and format identifier (ISO 7498) AFSC Advanced features service center AFSK Automatic frequency shift keying AG/EEE Above ground electronic equipment enclosures AGC Automatic gain control AGM Normal aging months AGND Analog ground AGT Accelerated aging type AI Activate indication (C/I channel code) AI Artificial intelligence AI Assigner's initials AI Automatic identified outward dialing INTER/TRA blocal 1-26 AIC Automatic intercept center AICC Automatic intercept communications controller AIN Advanced intelligent network AIOD Automatic id of outward dialing AIOD Automatic identifaction of outward dialing AIS Alarm indication signal AIS Alarm indication signals AIS Automatic intercept system AIT Analit initialization of tables AIU AI upstream AL Alternate services INTER/TRA blocal 1-26 ALATS Automatic loop access system system (DDS service) ALBO Automatic line buildout ALE Address latch enable ALE Automatic line evaluation ALFE Analog line front end ALGOL Algorhythmic computer language ALI Automatic location indentification ALIT Automatic line insulation testing ALL All events ALL All module controller maintenance interrupts ALL Turns on all IDs ALPT Alarm scan points ALRM Alarms ALRU Automatic line record update ALS Automated list service AM Administrative module AM Amplitude modulation AM Asynchronous multiplexer AM Packet AMA Automatic Message Accounting AMA Automatic message accounting AMACS AMA collection system AMAIRR Automatic message accounting irregularity AMALOST Lost automatic message accounting AMARC AMA recent change AMARC AMA recording center AMASE AMA standard entry AMAT Automatic message accounting transmitter AMATPS Automatic message accounting teleprocessing system AMATPS Automatic message accounting transmitter teleprocessing system AMC Add-on module connector (-> sipb) AMERITECH American information technologies AMI Alternate mark inversion code AML Automatic maintenance limit. AMP Advance measurement processor AMP Amplifier AMPS Advanced mobile phone service AMR Automatic meter reading AMWI Active message waiting indicator AN Announcement service INTER/TRA blocal 1-26 AN Associated number ANA Automatic number announcement ANC All number calling ANCT Analysis control table ANI Automatic number identification ANIF Automatic number identification failure ANM Answer msg. (SS7: in ISUP) ANS Answer ANS Answer On Bus ANS Answer msg. ANSER AT&T Network Servicing System (i.e. via EADAS link ) ANSI American national standards institute AO Allocation order AO International/overseas audio (full time) INTER/TRA blocal 1-26 AOC Advice of charge (i.256 B) AOSS Auxilliary operator service system AP Access point AP Application (OSI layer 7) AP Application processor AP Attached processor AP Auciliary processor AP Automatic position AP Commercial audio (part time) INTER/TRA blocal 1-26 AP-PG Access point page APC Alarm processor circuit APC Amarc protocol converter APD Access point data APD Avalanche photo diode APDB Access point data base APDL Application processor data link APH Application protocol handler API Application interface APM Application processor modules APPC Advanced program to program communication (IBM) APPL1-APPL5 Reserved for application handlers APS Automatic position system APS Automatic protection switch APS Automatic protection switching system AQ Autoquote problem. AR Activation request (C/I channel code) AR Alarm report AR01 Office alarm - 1AESS alarm message - AR02 Alarm retired or transferred - 1AESS alarm message - AR03 Fuse blown - 1AESS alarm message - AR04 Unknown alarm scan point activated - 1AESS alarm message - AR05 Commercial power failure - 1AESS alarm message - AR06 Switchroom alarm via alarm grid - 1AESS alarm message - AR07 Power plant alarm - 1AESS alarm message - AR08 Alarm circuit battery loss - 1AESS alarm message - AR09 AMA bus fuse blown - 1AESS alarm message - AR10 Alarm configuration has been changed (retired inhibited) - 1AESS AR11 Power converter trouble - 1AESS alarm message - AR13 Carrier group alarm - 1AESS alarm message - AR15 Hourly report on building and power alarms - 1AESS alarm message ARA Automatic reservation adjustment ARC Administrative responsibility code ARC Alternate route cancellation ARC Alternate route cancellation control ARC Audio response controller ARCOFI Audio ringing codec filter ARCOFI-SP ARCOFI + speakerphone function ARCOS ARCOFI coefficient support program ARCOTI SIPB telephone module ARD AR downstream ARG Alarm reference guide ARG Assemble and run a given master file ARIS Audichron recorded information system ARL Activation request local loop (C/I channel code) ARM Activation request maintenance (C/I channel code) ARM Asynchronous response mode ARM Automatic R(emote test system) maintance ARMAR Automatic request for manual assistance resolution ARN Activation request ARQ Automatic repeat request ARR Automatic ring recovery. ARS Alternate route selection ARS Automatic route selection ARSB Automated repair service bureau ARSB Automatic repair service bureau ARSSI Automatic rought selection screening index ART Audible ringing tone ARU Activation request upstream ARU Audio response unit ASAP As soon as possible ASC Alarm and status circuit ASC Alarm and status circuit . ASC Alarm surveillance and control ASCC2 Advanced serial communication controller ASCII American standard code for information interchange ASCII American standard code for information interexchange ASD Automated SMAS diagnostics ASDPE Synchronous data link controller (SDLC) A reset ASE Application service element ASEC Assignment section ASGN Assign ASGNMTS Assignments ASIC Application specific integrated circuit ASM Analog subscriber module ASOC Administrative service oversight center ASP Advanced service platform ASP Arcofi signal processor ASPACGCOMP ASP SCP response message with an ACG component received at the switch ASPBADRESP ASP SCP response message received with invalid data ASPEN Automatic system for performance evaluation of the network ASPNORTEMSG ASP reject message ret err and a play announc recei at the switch from the SCP ASPSNCOMP ASP SCP response message with a send notifi component received at the switch ASPTNMSG ASP termination notification message sent from the switch to the SCP ASR Access service request ASSN Assignment AST Position acknowledge seizure signal time-out (MDII) ASYNC Asynchronous AT Access tandem AT International/overseas audio (part time) INTER/TRA blocal 1-26 AT&T American telephone and telegraph AT-1 Auto test-1 AT-2 Auto test-2 AT01 Results of trunk test - 1AESS automatic trunk test ATA Automatic trunk analysis ATAB Area trunk assignment bureau ATAI Automatic troubler analysis interface ATB All Trunks Busy ATB All trunks busy ATC Automated testing control ATC Automatic transmission control ATD Accept date ATD Async. TDM ATH Abbreviated trouble history ATI Automatic test inhibit ATI Awake TI ATICS Automated toll integrity checking system ATIS Automatic transmitter identification system ATM Analog trunk module ATM Asynchronous transfer mode ATM Automatic teller machine ATMS Automated trunk measurement system ATN Assigner's telephone number ATO Time-out waiting for address complete signal ATP All tests pass ATR Alternate trunk routing ATRS Automated trouble reporting system ATTC Automatic transmission test and control circuit ATTCOM AT&T communications ATTG Attendant group ATTIS AT&T information system AU Access unit AU Autoscript INTER/TRA blocal 1-26 AU Auxiliary AUD Assignment list audit AUD Audits AUDIT Audit detected problem. AUDIX Audio information exchange AUP Access unit port AUTO Automaitc AUTODIN Automatic digital network AUTOSEVCOM Automatic secure voice communications AUTOVON Automatic voice network AUXF Auxillary frame AVD Alternate voice data AVD Alternate voice-data AWI Awake indication AZD All zeros data B B side (pair) (lead) B Bridged connection B Equipment number B6ZS Bipolar with 6 zero subsitution B8ZS Bipolar eight zero suppression encoding (DS-1) B8ZS Bipolar with 8 zeros substitution (T1 pri) B911 Basic 911 BA Basic access BA Protective alarm (CD) INTER/TRA blocal 1-26 BAF Blocking acknowledgment failure BAI Bridge lifter assignment inquiry BAL Balance BAMAF Bellcore AMA format BANCS Bell administrative network communications system BANKS Bell adminastration network systems BAPCO Bellsouth advertising & publishing company BAS Basic activity subset BAT Battery (-48v) BAx Business address x (x = number of line) BB Blue box BBD0/1 Binary 0s or 1s detected in b and d channels BCC Bellcore client companies BCC Block check character BCC Blocked call cleared BCCP Bearer ccp BCD Binary coded decimal BCD Blocked call delayed BCFE Busy call forwarding extened BCID Business customer identifier BCLID Bulk calling line identification BCMS Basic call management system BCS Batch change supplement (NTI) (DMS-100) BDCA Unk BDCS Broadband digital cross-connect system BDS Basic data service BDT Billing data transmitter BEF Band elimination filter BEL Bell BELLCORE Bell communications research BER Bit error rate BERT Bit error rate test BETRS Basic exchange telecommunications radio service BG Battery and ground signaling BG/EEE Below ground electronic equipment enclosures BHC Busy hour call BHC Busy hour calls BIB Backward indicator bit (SS7) BICU Bus interface control unit BIFIFO Bidirectional fifo BIR Bit receiver BIR Bus interface register BISDN Broadband ISDN BISP Business information system program BISYNC Binary synchronous communications BIT Bit BIT Bit transmitter BITNET Because-it's-time network BITR Bit transceiver BIX Building internal cross-connects BK Back BKUP Backup BKUP Requests a backup BL Bell & lights INTER/TRA blocal 1-26 BL Bridge lifter BL Bridge lifters - COSMOS command BL/DS Busy line/don't answer BLA Blocking acknowledgement (SS7: in ISUP) BLF Busy line field BLFCA Blocking a fully coded addressed international outbound call routed to a non-common channel signaling trunk BLK Block BLKD Blocked BLO Blocking (SS7: in ISUP) BLS Bridge lifter status BLS Business listing service BLV Busy line verification BMC Billing media coverage BMD Batch mode display BMI Batch mode input - TIMEREL and DEMAND BMOSS Building maintance operations service system BMR Batch mode release BMU Basic measurement unit (dip) BND Band number BNS Billed number screening BNSDBOV BVA BNS message received indicating data base overload BNSDBUN BVA BNS message returned because data base unable to process BNSGMSG BVA BNS message received garbled BNSNBLK BVA BNS message returned because of network blockage BNSNCON BVA BNS message returned because of network congestion BNSNRTE BVA BNS message returned because of no routing data BNSTOUT BVA BNS message returned because of timeout BNSUNEQ BVA BNS message returned because of unequipped destination BNSURPY BVA BNS message received with an unexpected reply BNx Business name x (x = number of line) BOC Bell operating companies BOC Bell operating company BOCC Building operations control center BOP Byte oriented protocol BOR Basic output report BORSCHT Battery BOS Bit oriented signaling BOS Business office supervisor BOSS Billing and order support system BOSS Business office service system (NYNEX) BOT Beginning of tape BOT Bottom BPI Bits per inch BPOC Bell point of contact BPS Bits per second BPSK Binary psk BPSS Basic packet-switching service BPUMP Backup pump BR Bit robbing (CAS-BR) BRAT Business residence account tracking system BRCF Business and residential customer service feature BRCS Business and residential customer services BRCS Business residence custom service BRDCST Broadcase BRDG Bridge BRDGD Bridged BREVC Brevity control BRG Baud rate generator BRI Basic rate interface BRITE Basic rate interface transmission extension (5ESS) BRK Break BRM Basic remote module BRM Bell communications research practice BRST Bridge signature table BS Backspace BS Banded signaling BS Bias battery (-19.1v) BS Siren control INTER/TRA blocal 1-26 BSA Basic serving arrangements BSBH Busy season busy hour BSC Business service center BSC/RSC Business/residence service center BSCM Bisynchronous communications module BSDPE SDLC B reset BSE Basic service elements BSF Bell shock force BSI British standards institution BSN Backward sequence number (SS7) BSOC Bell systems operating company BSP Bell system practice BSRF Basic standard reference frequency BSRFS Bell system reference frequency standard BST Basic services terminal BSTJ Bell system technical journal BT British telecom BTAM Basic telecommunications access message BTH Both BTL Bell telephone laboratories BTN Billing telephone number BTSR Bootstrapper board BTU British thermal unit BUFF System buffers (NTI) BVA Billing validation application BVAPP Billing verification and authorization for payment process BVC Billing validation center BVS Basic voice service BWM Broadcast warning message BWT Broadcast warning twx BWTS Bandwidth test set BYF Display the bypass file BYP Change the contents of the bypass file C Counting rate C Current supervision C Scan point (SP) C&A Centrifugal and absorption C-ACD Commercial-automatic call distributor (OSPS) C-NCH C-notch C/I Command/indicate C/S UNIT Combiner and splitter C1 Circuit system CA Cable CA Cable number CA Collision avoidance CA SSN access INTER/TRA blocal 1-26 CABS Carrier access billing system CAC Calling-card authorization center CAC Carrier access code CAC Circuit administration center CAC Customer administration center CACHE Cache errors CAD Computer-aided dispatch CAD Critical alarm display CADN Circuit administration. CADV Combined alternate data/voice CAF Circuit reset acknowledgment failure CAFD Comptrollers' automatic message accounting format description CAFD Controllers automatic message accounting format description CAI Address incomplete received CAI Call assembly index CAIS Colocated automatic intercept system CALRS Centralized automatic loop reporting system CAM Communication access method CAM Computer aided manufacturing CAM Content adressable memory CAM Control administration module CAMA Central automatic message accounting. CAMA Centralized auto message accounting CAMA Centralized automatic message accounting CAN Cancel CANC Cancel (i.451) CANF Clear the cancel from CANT Clear the cancel to CAP Capacitance CARL Computerized administrative route layout CAROT Centralized automatic reporting on trunks CAROT Centralized automatic reporting on trunks. CAS Cannel associated signaling CAS Circuit associated signaling CAS Computerized autodial system CAS Craft access system (SARTS) CAS Customer account service CAS7ABM CAS common channel signaling 7 (CCS7) abort message received CAS7ACG CAS CCS7 ACG invoke component received CAS7GMG CAS CCS7 received with invalid format reply CAS7GWE CAS CCS7 error CAS7NCG CAS CCS7 message returned because of network congestion CAS7NFL CAS CCS7 message returned because of network failure CAS7RCR CAS CCS7 reject component received CAS7SCG CAS CCS7 message returned because of subsystem congestion CAS7SFL CAS CCS7 message returned because of subsystem failure CAS7TAN CAS CCS7 message returned CAS7TOT CAS CCS7 query which timed out before reply received CASDBOV CAS message received indicating data base overload CASDBOV Customer account services (CAS) message received indicating data b ase overload CASDBOV Customer account services (CAS) message received indicating databa se overload CASDBUN CAS message returned CASGMSG CAS message received garbled CASNBLK CAS message returned because of network blockage CASNCON CAS message returned because of network congestion CASNRTE CAS message returned because of no routing data CASTOUT CAS message returned because of timeout CASUNEQ CAS message returned because of unequipped destination CASURPY CAS message received with an unexpected reply CAT Centrex access treatment CAT Craft access terminal CATLAS Centralized automatic trouble locating and analysis system CAY Create an assembly CB OCC audio facilitys INTER/TRA blocal 1-26 CBA Change back acknowledgement (SS7: in mtp) CBD Change back declaration (SS7: in mtp) CBEMA Computer and business equipment manufacturers' assc. CBERR Correctable bit error CBS Crossbar switching CBX Computerized branch exchange CC Call count CC Central control CC Central controller CC Common channel (CAS-CC) CC Common control CC Connection confirm CC Country code CC Country code (ISO 7498) CC Initials of person closing report out to catlas. CC OCC digital facility-medium speed INTER/TRA blocal 1-26 CC1 Call control 1 (IOS) CCA Change customer attributes CCA Computer content architecture (ISO 8637/2) CCBS Completion of call to busy subscribers (i.253 c) CCC Centeral control complex CCC Central control complex CCC Clear channel capability CCC Computer control center CCD Change due date - COSMOS command CCDDBOV BVA calling card (CCRD) message received indicating data base overload CCDDBUN BVA CCRD message returned because data base unable to process CCDGMSG BVA CCRD message received garbled CCDNBLK BVA CCRD message returned because of network blockage CCDNCON BVA CCRD message returned because of network congestion CCDNRTE BVA CCRD message returned because of no routing data CCDR Calling card CCDTOUT BVA CCRD message returned because of timeout CCDUNEQ BVA CCRD message returned because of unequipped destination CCDURPY BVA CCRD message received with an unexpected reply CCF Custom calling features CCH Connections per circuit per hour CCIR Comite' consultatif international des radio communications CCIR Consultative committee for radiocomunication (international radio CCIS Common channel interoffice signaling CCITT Comite' consultatif international telegraphique et telephonique CCITT Consultative committee for internat. telephone and telegraph CCM Customer control management CCNC CCS network control CCNC Common channel network controller CCNC Computer/communications network center CCOA Cabinet control and office alarm CCP Call control part CCR Clock configuration register CCR Continuity check request (SS7: in ISUP) CCR Customer-controlled reconfiguration CCRC Corrupt crc (IOM2 monitor command) CCRD Calling card (5E) CCRS Centrex customers ... system CCS Centum Call Seconds CCS Cluster support system CCS Common channel signaling CCS Custom calling services (NTI) CCS Hundred (C) call seconds CCS Hundred call seconds CCSA Common control switching arrangement CCT Central control terminal CCT Initialize and update the contractor-transducer file CCTAC Computer communications trouble analysis center CCU Colt computer unit CCU Combined channel units CCU Communication control unit CCV Calling card validation CD Call deflection (i.252 e) CD Collision detection (->csma/) CDA Call data accumulator CDA Change distribution attributes CDA Coin detection and announcement CDACS Concentrating DACS CDAR Customer dialed account recording CDC Central distrubtion center CDCF Cumulative discounted cash flow CDD Change due date CDF Combined distributing frame CDF DTF coin CDFI Communication link digital facilities interface CDI Circle digit identification CDI Connected line identification (i.251 C/E) CDI Control and data interface. CDI Control data interface CDIG Circle digit translation (NTI) CDM Coax data module CDMA Code division ma CDO Community dial office CDPR Customer dial pulse receiver CDQ1 Custom calling services discount quote CDR Call detail record CDR Call dial rerouting CDR Collision detect input line CDR Cut thru dip report CDRR Call detail recording and reporting CDS Circuit design system CDS Codes CDS Craft dispatch system CE Collision elimination (->CSMA/) CE Common equipment data (NTI) CE Conducted emission (EME) CE SSN station line INTER/TRA blocal 1-26 CEF Cable entrance facility CEI Comparable efficient interconnection CEI Comparably efficient interconnection CEN European committee of standards CENELEC European committee of standards (electrotechnics) CEP Connection endpoint CEPT European conference of post/telecom administrations CES CC error summary CEU CCS estimated usage CEV Control environmental vault CEV Controlled environment vault CF Coin first CF OCC special facility INTER/TRA blocal 1-26 CFA Carrir failure alarms CFA Change facility attributes CFC Cost function code CFCA Communications fraud control association CFD Coinless ANI7 charge-a-call CFGN Configuration CFI Configurable interface (SIPB) CFINIT Custom calling feature table CFN Call forward number CFND Call forward number don't answer CFNR Call forwarding no reply (i.252 c) CFP Call forwarding busy (i.252 b) CFP Print the class of service/features for an electromechanical enti CFR Code of federal regulations CFT Craft CFU Call forwarding unconditional (i.252 d) CFU Change facility usage CG Control group number CG OCC telegraph facility INTER/TRA blocal 1-26 CG01 Carrier group in alarm - 1AESS carrier group CG03 Reason for above - 1AESS carrier group CGA Carrier group alarm CGA Carrier group assignment CGAP Call gapping CGAP Call gapping code controls messages. CGB Circuit group blocking (SS7: in ISUP) CGBA CGB acknowledgement CGM Computer graphics metafile (ISO DIS 8632) CGN Concentrator group number CGNC Connector group network controller CGU Circuit group unblocking (SS7: in ISUP) CGUA CGU acknowledgement CH Change CH OCC digital facility high-speed INTER/TRA blocal 1-26 CHAN Channel CHAPS UNK - a known AT&T System - def. unknown CHAR Character CHG LASG Change loop assignment CHK Check CHR Chronical CI Concentrator identifier trunk INTER/TRA blocal 1-26 CI0IN Control interface 0 interrupt CI1IN Control interface 1 interrupt CIB Centralized intercept bureau CIC Carrier identification codes CIC Circuit identification code CIC Customer Information Center (AT&T) CICS Customer information control system CID Connection identification CIE Company establish company initiated change CIF Common intermediate format (for ISDN high end video) CIH Craft interface handler CII Call identity index CII Initial address message (IAM) irregularity (incoming) CIMAP Circuit installation and maintance assistance program CIMAP/CC Circuit installation and maintenance assistance/control center CIP Control interface port CIRR C/I receive register CIS Crimeline information systems CIS Customized intercept service CIXR C/I transmit register CJ OCC control facility INTER/TRA blocal 1-26 CK Checkbits CK OCC overseas connecting facility wide-band INTER/TRA blocal 1-26 CKF Continuity check failure (incoming) CKID Circuit identification CKL Circuit location CKS Clock select bit CKT Circuit CKT Circuit. CKTRY Cuicuitry CL Centrex CO line INTER/TRA blocal 1-26 CLASS Centralized local area selective signaling CLASS Custom local area signaling service CLC Common language code for an entity CLCI Common language circuit identification CLCT Network management control counts CLDIR Call direction CLDN Calling line directory number CLEI Common language equipment identifier CLF Creating dips upper bound load factor CLFI Common lang facilities identication CLI COSMOS processed alit reports CLI Calling line ident CLID Calling line identification CLIP Calling line identification presentation (i.251 c) CLIR Calling line identification restriction (i.251 d) CLK Clock CLL Creating dips lower bound load factor CLLI Common-language location identification CLNK Communication link CLNKs Communication links CLNORM Communication link normalization CLR Circuit layout record CLR Clear CLRC Circuit layout record card CLS CLCI in serial number format CLS Connectless-mode service CLSD Closed CLSV Class of service CLT CLCI telephone number format CLT Communications line terminal CLUS Cluster data (NTI) CM C-message frequency weighting CM Communication module CM Connection memory CM OCC video facility INTER/TRA blocal 1-26 CMAC Centralized maintenance and administration center CMAP Centralized maintance and administration position CMC Call modification completed (SS7: in ISUP) CMC Cellular mobile carrier CMC Cellular modile carrier CMC Construction maintenance center CMD Command CMDF Combined main distributing frame CMDS Centralized message data system CMF Capacity main station fill CMP Communication module processor CMP Communications module processor CMP Companion board CMP Corrective maintenancean practices CMPR Compares CMR Call modification request (SS7: in ISUP) CMR Cellular mobile radio CMRJ CMR reject (SS7: in ISUP) CMS Call management system CMS Circuit maintance system CMS Circuit maintance system 1C CMS Circuit maintenance system CMS Communications management subsystem CMS Conversational monitoring system CMT Cellular mobile telephone CMT Combined miscellaneous trunk frame CMU CCS measured usage CMU Colt measurement unit CN C-notch frequancy weighting CN Change notice CN Changel noticee CN Connection CN SSN network trunk INTER/TRA blocal 1-26 CN/A Customer name/address CN02 List of pay phones with coin disposal problems - 1AESS coin phone CN03 Possible trouble - 1AESS coin phone CN04 Phone taken out of restored service because of possible coin fraud CNA Communications network application CNAB Customer name/address bureau CNCC Customer network control center CNI Common network interface CNMS Cylink network management system CNS Complimentary network service CNS Concentrating network system CNT Count CNTS Counts CNVT Converted CO Central office CO Continuous (SARTS) CO OCC overseas connecting facility INTER/TRA blocal 1-26 CO UN Central office unit code COA Change over acknowledgement (SS7 in MTE) COAM Centralized operation COAM Customer owned and maintained COC Circuit order control COCOT Customer-owned coin-operated telephone COD Code CODCF Central office data connecting facility CODEC Coder/decoder COE Central office entity COE Central office equipment COEES COE engineering system COEES Central office equipment engineering system COER Central office equipment record COEST Central office equipment signature table COF Confusion received (outgoing) COFA Change of frame alignment (DS-1) COG Centralized operations group COGRDG Central office grounding COLP Connected line identification presentation COLR Connected line identification restriction COLT Central office limit table COLT Central office line tester COM Common controller COM Communication COM Complement size COM Computer output microfilm COM/EXP PCM-compander/expander COMM Comunication COMMS Central office maintenance management system COMMS-PM Central office maintenance management system-preventive Maintenance COMP Computed COMPNY Company COMPS Central Office Managenment Program (GTE) COMSAT Communications satellite CON Concentrator - COSMOS command COND Conditions CONF Conference calling (i.254 a) CONFIG Configutation CONN Connect msg. (i.451) CONN Connector CONN Nailed-up connections CONT Control CONTAC Central office network access CONUS Continental united states COO Change over order (SS7: in MTP) COP Call offering procedure COPY Data copied from one address to another - 1AESS copy CORC Commands and responses definition and compressing program (IOS) CORC Customer riginated recent change CORCs Customer-originated recent changes CORNET Corperate network COS Connection-mode service COSIB Central office platform operator service interface board COSMIC Common systems main interconnection frame system (frame) COSMOS Computer system for mainframe operations COT Centeral office terminal COT Central office technician COT Central office terminal COT Central office terminal (opposite to RT) COT Continuity (SS7: in ISUP) COTM Central office overload call timing (NTI) CP Cable pair CP Call processing parameters (NTI) CP Communication processor (SARTS) CP Concentrator identifier signaling link INTER/TRA blocal 1-26 CP Control program CPA Centralized/bulk power architecture CPC Cellular phone company CPC Circuit provision center CPC Circuit provisioning center CPC Circuit provisioning center (special services design group) CPCE Common peripheral controller equipment CPD Central pulse distributor CPD Common packet data channels CPE Customer premise equipment CPE Customer premises equipment CPG Call progress (SS7: in ISUP) CPH Cost per hour CPI COSMOS-premis interface CPI Computer private branch exchange interface CPIE CP or AM intervention interrupt error CPM COSMOS performance monitor CPM Citcuit pack module CPM Cost per minute CPMP Carrier performance measurement plan CPS Cycles per second CPU CCS capacity usage CPU Call pick up CPU Call pickup group CPU Central processing unit CQM Circuit group query (SS7: in ISUP) CQR CQM response CR Carriage return CR Control Record CR Control response CR OCC backup facility INTER/TRA blocal 1-26 CRAS Cable repair administrative system CRC Customer record center CRC Cyclic redundancy check CRCOK CRC ok! (C/I channel code) CRE Create CRED Credit card calling (i.256 a) CREF Connection refused CREG Concentrated range extension with gain CRF Continuity recheck failure (outgoing) CRFMP Cable repair force management plan CRG Creg tag CRIS Customer records information system CROT Centralized automatic reporting of trunks (NTI) CRR Reset received (incoming) CRS Centralized results system CRSAB Centralized repair service answering bureau CRST Specific carrier restricted CRT Cathode ray tube CRT Cathode-ray tube CRTM Central office regular call processing timing (NTI) CS Cable switching CS Call Store CS Channel service INTER/TRA blocal 1-26 CS Conducted susceptibility (EMS) CS Customer class of service CSA Carrier serving area CSACC Customer service administration control center CSAR Centralized system for analysis and reporting CSAR Centralized system for analysis reporting CSC Cell site controller CSD Circuit specific data CSDC Circuit switched digital capability CSDN Circuit-switched data network (t.70) CSF Critical short form CSMA/ Carrier sense multiple access CSMCC Complex services maintenance control center CSNET Computer science network CSO Central services organization CSO Cold start only (in eoc) CSP Coin sent paid CSP Coin set paid CSPDN Circuit-switched public data network CSR Clock shift register CSR Customer service records CSS Computer sub-system CSS Computer subsystem CSS Customer service system CSSC Customer service system center CST Call state or current state or change state (QUASI SDL) CST Combined services terminal CSU Channel service unit CSUS Centralized automatic message accounting suspension (NTI) CT Call transfer (i.252 a) CT Control terminal CT SSN tie trunk INTER/TRA blocal 1-26 CT01 Manually requested trace line to line information follows - 1AESS CT02 Manually requested trace line to trunk information follows - 1AESS CT03 Intraoffice call placed to a number with CLID - 1AESS call trace CT04 Interoffice call placed to a number with CLID - 1AESS call trace CT05 Call placed to number on the ci list - 1AESS call trace CT06 Contents of the CI list - 1AESS call trace CT07 ACD related trace - 1AESS call trace CTC Central test center CTC Centralized test center (DDS) CTC Centralized testing center CTC Complete a cable transfer or complete a cable throw CTD Circuit test data CTE Cable throw order establishment CTF Display the contacter-transducer file CTI Circuit termination identification CTL Cable throw with line equipment assignment CTL Central operator control CTM Cable throw modification CTM Contac trunk module CTMC Communications terminal module controller CTMS Carrier transmission measuring system CTO Call transfer outside CTO Continuity timeout (incoming) CTP Print cable transfer frame work CTR Cable throw replacement CTS Cable throw summary CTS Call through simulator CTS Clear to send CTSS Cray time sharing system CTT Cartridge tape transport CTT Cut through tag CTTC Cartridge tape transport controller CTTN Cable trunk ticket number CTTU Central trunk testing unit. CTU Channel test unit CTW Withdraw a cable transfer or a cable throw CTX Centrex group number CTX Various centrix verifies CU Channel unit CU Channel unit CU Control unit CU Customer unit CU/EQ Common update/equipment system CU/TK Common update/trunking system CUCRIT Capital utilization criteria CUG Closed user group (i.255 a) CUP Common update processor CUSTAT Control unit hardware status CUT Circuit under test CUTOVER Cutover (pre-cut) inactive state. CV OCC voice grade facility INTER/TRA blocal 1-26 CVN Vacant national number received (outgoing) CVR Compass voice response CW Call waiting (i.253 a) CW OCC wire pair facility INTER/TRA blocal 1-26 CWC City-wide centrex CWD Call waiting deluxe CXC Complex service order input checker CXM Centrex table management CXT Complex order inquiry for nac review CZ OCC access facility INTER/TRA blocal 1-26 CorNet Corporate network protocol (ECMA and CCITT q.930/931 oriented) D Data D Default supervision D Digits D Dispach D Hotel/motel equipment from trouble report (TSPS only) D-CTL D channel controller (IDEC) D/A Digital to analog D1PK DS-1 interface pack (SCM-10S NTI) D1PK DS-1 interface pack (SCM-10S MUX NTI) DA Digital data off-net extention INTER/TRA blocal 1-26 DA Directory assistance DAC Digital to analog converter DAC Dispatch Administration Center DACC Directort assistance call completion DACK Direct memory access acknowledge DACOM Data communictions corp. of korea (ROK) DACS Digital access cross-connect system DACS Digital accessed and cross-connected system DACS Directory assistance charging system DACTVTD Deactivated DAEDR Delimitation DAIS Distributed automatic intercept system DAML Digital added main line (pair gain) DAMT Direct access mechanize testing DAP Display administration process DAP Document application profile DARC Division alarm recording center DART Distribution area rehabilitation DARU Distributed automatic intercept system audio response unit DAS Data auxiliary set DAS Directory assistance system DAS Distributor and scanner DAS-WDT Distributor and scanner-watch dog timer DAS/C Directory assistance system/computer DASD Direct access storage device DASS2 Digital access signaling system 2 (BT) DAU Digital access unit DAV Data above voice DAY Delete an assembly DB DSSDS 1.5 mb/s access line INTER/TRA blocal 1-26 DB Decibel DBA Data base administrator DBAC Data base administration center DBAS Data base administration system DBCS Data bank control system DBL Data base load DBM Database manager DBMS Data base management system DBOS Data bank organization system DBS Duplex bus selector DBSS Data bank security system DC Device cinfirmation (C/I channel code) DC Dial code DC Direct current DCC Data collection computer DCC Data country code (ISO 7498) DCC Destination code cancellation DCC Destination code cancellation control DCC Digroup core controller DCCS Discontiguous shared segments DCD Data collection device DCE Data circuit terminal equipment DCE Data circuit-terminating equipment DCE Data communications equipment DCE Digital carrier equipment DCG Default cell group DCH D channel handler DCH D-channel handling bit DCH Discharge DCHOOS D-channel is out of service. DCL Data clock (i.e. IOM2) DCL Dec control language DCLU Digital carrier line uint DCLU Digital carrier line unit DCM Digital carrier module DCME Digital circuit multiplexing equipment DCMS Distributed call measurement system DCMU Digital concentrator measurement unit DCN List disconnected and changed numbers DCP D channel processor DCP Duplex central processor DCPR Detailed contuing property record (pics/dcpr) DCPSK Differential coherent phase-shift keying DCS Data communications subsystem DCS Digital crosconnect system DCS Digital cross-connect system DCS Direct current signaling DCSO Display compleated service order (lmos command) DCT Digital carrier trunk DCTB Dct bank DCTEXT DCT extended DCTN Defense commercial telecommunications network DCTS Dimension custom telephone service DCTUCOM Directly connected test unit common board DCTUPORT Directly connected test unit port circuit DCn Device control n DD Data downstream (i.e. IOM2) DD Delay dial DD Disk drives DD Due date DD Total switching control center (SCC) and field work time. DDC Direct department calling DDCMP Daily display conversation mode and printer DDD Direct distance dialing DDGT Digital data group terminal DDI Direct dialing-in (i.251 A) DDN Defense data network DDOV Digital data over voice DDS DDS loopback test (SARTS command) DDS Dataphone digital service DDS Digital data service DDS Digital data system DDS Digital data system (the network) dataphone digital DDS Digital dataphone service DDS Display the DS table DDX Digital data exchange DDX Distributed data exchange DEAC Deactivation (C/I channel code) DEACT Deactivate DEC Digital equipment corporation DECT Digital european cellular phone DEL Delete DEN Digital equipment number DERP Defective equipment replacement program DES Data encryption standard DES Destination DEST Destinations DET Detatch MSG. (i.451) DEV Deviation DEV Device DEW Distant early warning (line) DF Distributing frame DF Distribution frame DF HSSDS 1.5 mb/s hub to hub INTER/TRA blocal 1-26 DFC Disk file controller DFI Digital facility interface DFI Digital facility interface. DFI Digital family interface DFIH Digital facility interface circuit pair DFMS Digital facility management system DFTAC Distributing frame test access circuit DG HSSDS 1.5 mb/s hub to earth station INTER/TRA blocal 1-26 DGCT Diagnostic control table DGN Diagnose DGN Memory failure in CS/PS diagnostic program - 1AESS mem diag DH Digital service INTER/TRA blocal 1-26 DI Deactivation indication (C/I channel code) DI Direct-in dial INTER/TRA blocal 1-26 DI Unk division? DIA Document interchange architecture DIAG Diagnostic DIC Digital concentrator DIC Digital interface controller DID DI downstream DID Direct inward dialing DIF Digital frame interface DIF Digital interface DIF Digital interface frame DIFF Difference DILEP Digital line engineering program DIM Data in the middle DIP Dedicated inside plant COSMOS command DIP Dip creation option DIP Document interchange protocol (lower sublayer of OSI layer 6) DIP Dual in-line package DIR Direction DIR Directory DIR Standard dip report DIS Disconnect DIS Display DISA Direct inward system access DISABL Disable DISC Disconnect (LAP-D command) DISD Direct inward subscriber access DIST Distribute point board DIU Deactivate indication DIU Digital interface unit DIU Digroup interface unit (DACS) DIV (Ger) Digital exchange DIVF (Ger) Div for long distance service DIVO (Ger) Div for local service DJ Digit trunk INTER/TRA blocal 1-26 DK Data link INTER/TRA blocal 1-26 DL Dial DL Dictation line INTER/TRA blocal 1-26 DL1PE DLI 1 parity error DL5MDA Someone who collects each ISDN abbrevation crossing his way DLAB Divisor latch access bit DLC Data link control DLC Data link controller assignment for clusters DLC Digital loop carrier DLCI Data link connection identifier (i.440: SAPI+TEI) DLCU Digital line carrier unit DLE Data link escape (ascii control) DLI Data link interface DLI0I Data link 0 interrupt DLI1I Data link 1 interrupt DLISW DLI switch error DLL Dial long lines DLM Data link module DLN Direct link node DLNORSP Init response not received from data link. DLOPE Dual link interface (DLI) 0 parity error DLP Data level point DLS Digital line section DLS Digital link service DLTHA Display trouble history all (LMOS command) DLTU Digital line trunk unit DLTU Digital line/trunk unit DLU-PG Digital line unit-pair gain DLUC Digital line unit control DLYR Delayed readiness DM DMR DM Delta modulation DM Disconnected mode (LAP-D response) DMA Direct memory access DMB Digital multipoint bridge DMERT Duplex multiple environment real time DMI Digital multiplexed interface DML Data manipulation logic DMLHG DSN/AUTOVON MLHG DMQ Deferred maintenance queue DMS Data management system DMS Digital multiplex system (i.e. DMS 10, DMS 100) DMS Digital multiplexed system DMU Data manipulation unit DN Directory number DN Directory numbers DN Distribution network panel DN Down DN Mail distribution frame - COSMOS defult DNC Dynamic network controller DNH Directory Number Hunting DNHR Dynamic non hierarchical routing DNHR Dynamic nonhierarchical routing DNI Digital network interconnecting DNIC Data network identification code DNIC Data network identification code (ISO 7498) DNR Detaled number record DNR Dialed number recorder DNX Dynamic network X-connect DO Direct-out dial INTER/TRA blocal 1-26 DOC Dynamic overload control DOC Dynamic overload controls messages. DOCS Display operator console system DOD (USA) Dept. of defense DOJ Department of justice DOM Data on master group DOTS Digital office timing supply DOV Data over voice DP Demarcation point DP Dial pulse DP Digital data-2 4 kb/s INTER/TRA blocal 1-26 DPA Different premises address DPA Dispatch DPA Distributed power architecture DPAC Dedicated plant assignment card DPAC Dedicated plant assignment center DPC Destination point code (SSY) DPCM Differential PCM DPE Data path extender DPGS Digital pair gain systems DPIDB Direct PIDB DPIDB Directly connected peripheral interface data bus DPLL Digital phase locked loop DPN Dip purge number DPN-PH Data packet network-packet handler DPNSS Digital private network signaling system (BT) DPP Discounted payback period DPP Distributed processing peripheral DPR Dip report and removal DPSK Differential phase shift keying DPSK Differential phased-shift keying DPT Data parameter testing DPT Department name DPU Digital patch unit DQ Digital data-4 8 kb/s INTER/TRA blocal 1-26 DQR Design quota system report DQS Design quota system DR Data ready DR Data receive DR Deactivate request (C/I channel code) DR Deactivation request DR Digital data-9.6 kb/s INTER/TRA blocal 1-26 DRAM Digital record announcement machine DRAM Dynamic ram DRCS Dynamically redefinable character sets DRHR Division of revenue hourly DRMU Digital remote measurement unit DRTLRT Dial repe tie lindal repeatie t DRU DACS remote unit DS Data set DS Digital carrier span DS Digital signal DS Direct signal DS-0 Digital signal 0 (one channel at 64 kb/s) DS-0A Digital signal at a subrate level on DS-0 for one customer DS-0B Digital signals at a subrate level on DS-0 facility for one or more CU DS-1 Digital signal level one DS0 Digital signal zer0 DSBAM Double-sideband amplitude module DSBLD Disabled (default). DSC Digital cross-connection systems DSC Digital subscriber controller AM79C3A DSCT Digital service copper transport DSDC Direct service dial capability DSI Digital speech interpolation DSIG Direct signaling DSK Disk DSL Digital subscriber line DSL Digital suscriber line DSLG digital subscriber line group (DSLG) DSLINIT DSL initialization. DSM Digital switching module DSMX (Ger) Digital signal multiplexer DSN Defense switched network/automatic voice network DSN Digital signal (level) n DSNE Double shelf network equipment frame DSNOFC DSN/AUTOVON office totals DSNTG DSN/AUTOVON trunk group DSP Digital signal processing DSP Digital signal processing or digital signal processor DSP Digital signal processor DSP Domain specific part (ISO 7498) DSR Data set ready DSR Display results DSR Dynamic service register DSRTP Digital service remote test port DSS Data station selector DST Destination of order response DSU Data service unit DSU Data servicing unit DSU Digital service unit DSU2 Diditalservice unit DSX Digital cross-connect DSX Digital signal cross-connect DT DI-group terminal DT Data through (C/I channel code in test mode) DT Data transmit DT Detect dial tone DT Due time DT1 Data form class 1 DTAC Digital access connector DTAC Digital test access connector DTAC Digital test access connector (links SMAS and SLC-96) DTAM Document transfer access and manipulation DTAS Digital test access system DTAU Digital test access unit DTC Data test center DTC Di-group terminal controller DTC Digital telephone controller (ARCOFI + IBC + ICC) DTC Digital trunk controller DTE Data terminal equipment DTE Print current date DTF Dial tone first (pay phone) DTG Direct trunk group DTIF Digital transmission interface frame DTM Data test module DTM Digital trunk module DTMF Dual-tone multifrequency DTR Data terminal ready DTRK Digital Trunks DTRK Digital trunks (line and trunk) DTU Di-group terminal unit DTU Digital test unit DU Data upstream (i.e. IOM2) DU Deactivation request upstream (C/I channel code) DUIH Direct user interface handler DUP Data user part DUP Duplicate DUR Duration DUV Data under voice DVA Design verified and assigned DVX Digital voice exchange DW Digital data-56 kb/s INTER/TRA blocal 1-26 DX Duplex DY Digital service (under 1 mb/s) INTER/TRA blocal 1-26 DYRECT Sides dynamic real time communication tester (in sitest) E E (receive) signal lead (moreover Ear part of E&M) E Equipment direction E Remote trunk arrangement position subsystem (rta/pss) from troubl E&M Receive & transmit/ear & mouth signaling E-COM Electronic computer originated mail E1 Equipment system E800 Enhanced 800 Service E911 Enhanced 911 EA Equal access end office EA Expedited data acknowledgement (SS7: in SCCP) EA Extended adress EA Switched acess INTER/TRA blocal 1-26 EAAT Equal access alternative technologies EADAS Engineering and administration data acquisition system EADAS/NM EADAS/network management EAEO Equial access end office EAI Emergency action interface EAP Equal access plan EARN European academic research network EAS Extended announcement system EAS Extended area service EASD Equal access service date EB Enfia ii end office trunk INTER/TRA blocal 1-26 EBAC Equipmentc billing accuracy control EBCDIC Extended binary coded decimal interexchange code EBSP EBS prefix translations EBSP Enhanced business services prefix translations EC ESS entity and control group number EC Echo canceller EC Enfia ii tandem trunk INTER/TRA blocal 1-26 EC Environment code EC European community EC Exchange carriers ECAP Electronic customer access program ECC Enter cable change ECCS Economic c (hundred) call seconds ECD Equipment configuration database ECDMAN Equipment configuration database manager ECF Enhanced connectivity facility ECL Emitter coupled logic ECMA European computer manufactueres association ECPT Electronic coin public telephone ECR Exchange carrier relations ECS Electronic crosconnect system ECS Equipment class of service ED Enter date EDAC Electromechanical digital adapter circuit EDD Envelope delay distortion EDI Electronic data interchange EDP Electronic data processing EDSC Electronic directory customer counts (ISDN BRCS) EDSX Electronic digital signal x-connect EDZ Facility emergency assignment list EE Combined access INTER/TRA blocal 1-26 EE Initials of supervisor reviewing this ticket. EEC Electronic equipment cabinet EECT End-to-end call trace EEDP Expanded electronic tandem switching dialing plan EEE Electronic equipment enclosures EEHO Either end hop off EEI Equipment-to-equipment interface EEPROM Electrically erasable programmable read only memory EF Entrance facility-voice grade INTER/TRA blocal 1-26 EFCTS Electronic custom telephone service EFRAP Exchange feeder route analysis program EG Type #2 telegraph INTER/TRA blocal 1-26 EIA Electronic industries association EIS Expanded inband signaling EISS Economic impact study system EIU Extended interface unit EIn Error indication n (C/I channel code) EKTS Electonic key telephone service EKTS Electronic key telephone sets EL Emergency reporting line INTER/TRA blocal 1-26 ELA Entity load analysis ELDS Exchange line data service ELECL Electrical ELEMNTS Elements ELI Electrical line interface EM Emergency reporting center trunk INTER/TRA blocal 1-26 EM Encription module EM End of medium (ASCII control) EMC Electromagnetic capability EMC Electromagnetic compatibility EME Electromagnetic emission EMI Electromagnetic interference EML Expected measured loss EMM Expandable mos memory EMS Electromagnetic susceptibility EMS Expanded memory specification EMSCC Electromechanical switching control center EMV EMC (german) EN Entity EN Entity number EN Exchange network acess facility INTER/TRA blocal 1-26 ENABL Enable ENFIA Exchange network facility for interstate access ENHMT Enhancement ENQ Enquiry ENTDT Entered date and/or time EO End office EOC Embedded operation channel EOE Electronic order exchange EOM End of message EOS Extended operating system EOTT End office toll trunking EP Entrance facility-program grade INTER/TRA blocal 1-26 EP Expedited data (SS7: in SCCP) EPIC Extended PIC EPL Electronic switching system program language EPROM Erasable programmable read-only memory EPSCS Enhanced private switched communication service EQ Equalizer EQ Equipment only-(network only) assignment INTER/TRA blocal 1-26 EQPT Equipment ER Enhancement request ER Error register ER Exception report ERAR Error return address register ERC Error control (IOS) EREP Environmental recording editing and printing ERF Emergency restoration facility ERL Echo return loss ERP Effective radiated power ERPMP Exception report pumper ERR Error ERRS Errors ERTS Error rate test set ERTS Error rate test sets ERU Error return address update ES Extension service-voice grade INTER/TRA blocal 1-26 ESAC Electronic systems assistance center ESAP Emergency Stand-Alone prefix ESAP Emergency stand-alone prefix ESB Emergency service bureau ESC Enhanced speech circuit ESC Escape (ASCII control) ESC Three way calling USOC ESCC2 Extended high level serial communication controller ESCC8 Like ESCC2 ESD Electrostatic discharge ESD Extened super framing ESF Extended super frame ESF Speed calling USOC ESFF Extended superframe format ESL Emergency stand-alone ESL Essental service ESL Speed calling 8 code USOC ESM Call forwarding USOC ESM Economic study module ESMTC Electronic system maintance ESN Electronic serial number (Cell) ESN Electronic switched network ESN Emergency service number ESP Enhanced service procider ESP Enhanced service providers ESP Essential service protection ESP Print entire summary table ESS Electronic switching system ESSX Electronic switching systen exchange EST Established ESTAB Establish ESX Call waiting USOC ET Entrance facility-telegraph grade INTER/TRA blocal 1-26 ET Exchange termination ETAS Emergency technical assistance ETB End of transmission block ETC Estimated trunk ccs value ETF Electronic toll fraud ETL Equipment test list ETN Electronic tandem network ETRI Electronics and telecommunications research institute (ROK) ETS Electronic tandem switching ETS Electronic translation systems ETSACI Electronic tandem switching adminstration channel interface ETSSP ETS status panel ETX End of text EU End user EU Extension service-telegrasph grade INTER/TRA blocal 1-26 EUPOT End user-point of termination EV Enhanced emergency reporting trunk INTER/TRA blocal 1-26 EV Expected value EVB Busy call forward USOC EVC Bust call forward extended USOC EVD Delayed call forward USOC EVD Delayed call forwarding EVST (Ger) End exchange EW Off network MTS/WATS equivalent service INTER/TRA blocal 1-26 EWSD (Ger) Electronic dialing system (digital) EX Exercise EXD ECS crossloading option EXD Extra digit EXD Extra digit (MDII) EXP Extra pulse EXP Extra pulse (MDII) EXT Extension EXTC Expenditure type code F Facility direction F Fault (indicator) F Office or base unit from trouble report. F1 Facility system FA Frame aligner FA Fuse alarm FAA Facility accepted (SS7 in ISUP) FAC Facility FAC Facility Assiment Center FACD Facility changed msg. FACS Facilities assignment and control system FADS Dorce administration FANALM Fan alarm FAP Facilities analysis plan FAR Facility request (SS7: in ISUP) FAR Federal acquisition regulation FAS Frame alignment signal FAST First application system test FAT File allocation table FAX Faximile FC Feature control FC Frame control FC From cable FC/EC Function code and environment code FCA Final closure abandon (MDII) FCAP Facility capacity FCC Federal communications commission FCC Forward command channel FCC Frame control center FCD Frame comtinuity date FCG False cross or ground FCS File control systemction FCS Frame check sequence FD Private line-data INTER/TRA blocal 1-26 FDD Frame due date FDDI Fiber distributed data interface (x3t9.5) FDI Feeder/distribution interfaces FDM Frequency division multiplex FDM Frequency-division multiplexing FDMA FDM access FDP Field development program FDT Frame due time FDX Full duplex FDY Set fiscal day for LAC FEA Custom calling feature/PIC FEA Customer feature FEAT Feature FEAT Features FEBE Far end block error (IOM2 monitor message) FEC Forward error correction FECC Front end communication computer FED Far end data FELP Far end loop process FEMF Foreign electro-motive force FEPS Facility and equipment planning system FEV Far end voice FF Check appropriate space where trouble is located FF Form feed FG Group-supergroup spectrum INTER/TRA blocal 1-26 FGA Feature group A FGB Feature group B FGC Feature group C FGD Feature group D FGE Feature group E FGK Feature group K (ISDN Q.931) FIB Forward indication bit (SS7) FID Field indentifiers FIFO First in FIFO First in first out (storage) FIL Filter FIN Facility information msg. FIOC Frame input/output controller FIP Facility interface processor FIPS Federal information processing standards FISU Fill in signal unit (SS7) FITL Fiber in the loop FJ Frame jump (C/I channel code) FKP False key pulse FKP False key pulse (MDII) FL Fault locate FL Fault location FLA Flag FLD Field FLEXCOM Fiber optic communication FLR Frame layout report FLT Flat FM Frequency modulation FM01 DCT alarm activated or retired - 1AESS FM02 Possible failure of entire bank not just frame - 1A FM03 Error rate of specified digroup - 1AESS FM04 Digroup out of frame more than indicated - 1AESS FM05 Operation or release of the loop terminal relay-1AESS FM06 Result of digroup circuit diagnostics -1AESS FM07 Carrier group alarm status of specific group - 1AESS FM08 Carrier group alarm count for digroup - 1AESS FM09 Hourly report of carrier group alarms - 1AESS FM10 Public switched digital capacity failure - 1AESS FM11 PUC counts of carrier group errors - 1AESS FMAC Facility maintance administration center FMAC Facility maintenance and control FMC Force management center FMM Finite message machine FN Feature number FN File name FNBE Far and near end block error (IOM2 monitor message) FNPA Foreign numbering plan area FOA First office application FOC Fiber optic communications FON Fiber optics network FOR Frame order report FORPOT Foreign potential. FOS Frame operations summary FOS-ALC Fiber optic systems maintance - Alcatel FOS-ROCK Fiber optic system maintance - Rockwell FOT Forward transfer (SS7: in ISUP) FP Functional protocol FPC Foundation peripheral controller FPC Frequency comparison pilots FPS Fast packet switching FR Fire dispatch INTER/TRA blocal 1-26 FR Fixed resistance FR Flat rate FRAC Frame aligner circuit FRC Forced request configuration FREQ Frequency FRJ Facility rejected msg. (SS7 in ISUP) FRMR Frame reject (LAP-D response) FRPS Field reliability performance studies FRQ Facility request message FRS Flexible route selection FS File separator FS/SYM Function Schematic/Symbol Numbers (1AESS Test access) FSA False start abandon FSA False start abandon on incoming trunk FSC Frame synchronization clock (i.e. IOM2) FSK Frequency shift keying FSN Forward sequence number FT Foreign exchange trunk INTER/TRA blocal 1-26 FT Frame time FTA Frame transfer analysis FTC Frame transfer completion FTE Frame transfer establishment FTG Final trunk group FTL Frame transfer lets FTP File transfer protocol FTR Frame transfer reprint FTS Federal telecommunications system FTW Frame transfer withdrawal FUNCS Functions FV Voice grade facility INTER/TRA blocal 1-26 FW Wideband channel INTER/TRA blocal 1-26 FWD Forward FWM Frame work management FWS Frame work station FX Foreign exchange FX Foreign exchange INTER/TRA blocal 1-26 FXO Foreign exchange circuit office direction FXS Foreign exchange circuit station direction G Spare box. use for special studies. GAP (Ec) group of analysis and provision (for ONP) GB Great britain GBS Group bridging service GC Group card GCE Gated Oscillator Error GCI General circuit interface (IOM/u(k0)-interface) GCON Generic conditions GCP Generate Control pulse GCR General configuration register GCS Group control system GDSUCOM Global DSU common GDSUCOM Global digital service unit common GDX Gated diode crosspoint GDXACC Gated diode crosspoint access GDXC Gated diode crosspoint compensator GDXCON Gated diode crosspoint control circuit GEISCO General electric information services company GFR General facility report GG Getails of reported trouble. GH Gain hit GHZ Gigahertz GID Group ID GKCCR Generated key collection and compression routine GLA Generate lists for assignment GND Ground GNS Gainslope GNS Gainslope test (SARTS command) GOC General order control (TIRKS) GOS Grade of service GP Group processor GPA Gas pressure alarm GPIB General purpose interface bus GPPC General purpose power controller GPS Global positioning system GR General requirments (BellCoRe) GRA GRS acknowledgement GRASP Generic access package GRD Ground fault. GRD Ground. GRID Line unit grid. GRP Group GRP MOD Group modulator GRS Circuit group reset (SS7: in ISUP) GS Ground start (on-hook normal) GS Group separator GSA General services administration GSAT General telephone and electronics satellite corporation GST Ground start signaling GSZ Group size GTC General telephone company GTE General telephone electronics GTEI Global tei GTS Gamma transfer service GTT Global title transmission GWY Gateway Ger German H Hold state (in EOC) H Hours H Trouble ticket number. subparagraph 5.6.4. H&D High and dry (trunk test) H- High- H-RAP Hardware reliability assurance program HAC Hands-free add-on circuit (for speakerphone) HBS Hunt group blocks of spares HC High capacity 1.544 mb/ps-service code for LATA access HC Hunt count HCDS High capacity digital service HCDS High-capacity digital services HCFE High-capacity front end HCSDS High-capacity satellite digital service HCTDS High-capacity terrestrial digital service HD High capacity 3.152 mb/ps-service code for LATA access HDB3 High-density bipolar 3 (cept PRI) HDFI HSM digital facilities interface HDLC High level DLC HDLC High-level data link control HDSL High bit-rate digital subscriber line HDTV High definition television (soon to be the new buzz word!!) HDW Hardware HDX Half duplex HE High capacity 6.312 mb/ps-service code for LATA access HEAP Home energy assistance program HEHO High end hop off HF High capacity 6.312-service code for LATA access HF Hunt-from telephone number HFCC High capacity facility control center HFR Hardwara failure rate HG High capacity 274.176 mb/s-service code for LATA access HGBAF Hardware group blocking acknowledgment failure HGR Hunt group report HGS Hunt group summary HGUAF Hardware group unblocking acknowledgment failure HH History header HH Record of repair activity. HI High HI High impedance (C/I channel code) HI Highway interrupt HIC Hybrid integrated circuit HIM Host interface module HIS Hunting ISH HK Hook HL IT Siemens semiconductors (hl) HLC Highest lead factor group count HLDG Holding HLLAPI High level language application program interface HLSC High-level service circuits HM1 Intercom plus USOC HMCL Host message class assignment HMP Intercom plus HNPA Home numbering plan area HNS Hospitality network service HOBIC Hotel billing information center HOBIS Hotel billing information system HOLD Call hold (i.253 b) HP Hewlett-packard HP Non-DDS digital data 2.4 kb/s INTER/TRA blocal 1-26 HPO High performance option HQ Non-DDS digital data 4.8 kb/s INTER/TRA blocal 1-26 HR Hour HR Non-DDS digital data 9.6 kb/s INTER/TRA blocal 1-26 HRS Hours prefix HS High capacity subrate-service code for LATA access HSCC High level serial communication controller sab82520 HSCX Extended hscc sab82525 HSM Host switching module HSSDS High-speed switched digital service HT Horizontal tabulator HT Hunt-to telephone number HTI Highway transfer interrupt HU High usage HU High-usage trunk HUNT Hunting HUTG High usage trunk group HW High and wet. HW High-and-wet HW Non-DDS digital data 56 kb/s INTER/TRA blocal 1-26 HW Pcm highway HZ Hertz I Cable and pair or associated equipment I Information (LAP-D command) I Installation I Invalid I&I Investment and inventory I&M Customer services installation and maintenance I&M Installation & maintenance I- Information (numbered i-frames) I/O Ineffective other I/O Input/output devices I/O Tnput/output I0 Feature removed I1 Added feature IA Immediate action IA Ineffective attempts IAA Ineffective attempt analysis. IAAN Immediatel action report IAC0 DLI 0 access error IAC1 DLI 1 access error IACS Intergrated access cross-connected system IAD Incomplete address detected (incoming) IAM Initial address msg. (SS7: in ISUP) IB Instruction buffer IBC ISDN burst transceiver circuit IBN Integrated business network IBROFC ISDN BRCS and Analog Office totals IC Incoming call (x.25) IC Independent carrier IC Installation centers IC Inter-LATA carrier IC Inter-exchange carrier IC Interexchange carriers IC/MC Installation and maintence centers ICA Incoming advance ICA Incoming advance (MDII) ICAN Individual circuit analysis ICAO International civil aviation organization ICC ISDN communications controller ICC Interstate commerce commission ICCU Inmate call control unit ICD Interactive call distribution ICL Intra-RSM communication link ICLID Individual calling line id ICM Integrated call management ICN Interconnecting network ICOM (taiwan) integrated communication ICOT Intercity and outstate trunk ICP Intercept ICPOT Interexchange carrier-point of termination ICSC Inter-LATA customer service center ICSC Interexchange carrier service center ICSC Interexchange customer service center ICUG International closed user groups ICUP Individual circuit usage and peg count ICUR Individual circuit usage recorder ID Idle control code IDA (gb) interated digital access (b64+b8+d8) IDC Information distribution companies IDCI Interim defined central office interface IDCU Integrated digital carrier unit IDCU Integrated digital carrier unit . IDCU Integrated digital carrier unit i.e. AT&T Series 5 RT FP 303G IDDD International direct distance dialing IDEC ISDN d-channel exchange controller IDF Intermediate distributing frame IDI Initial domain identifier (ISO 7498) IDLC Integrated digital loop carrier IDLC Intergrated digital loop carrier IDP Individual dialing plan IDPC Integrated data protocol controller IDS Internal directory system IDVC Integrated data/voice channel IEC ISDN echo cancellation circuit IEC Interexchange carrier IEC International electrotechnical comission IEC-P (old name of iec-q3) IEC-Q1 Iec for 2b1q peb2091 IEC-Q2 Iec-q specially for lt and NT1 (without microprocessor) IEC-Q3 Iec-q with parallel processor interface (i.e. for daml) IEC-T Iec for 4b3t peb2090 IEEE Institute of electrical and electronics engineers IEPC ISDN exchange power controller IF Intermediate frequency IFAC Integrated digital carrier unit facility IFRB International frecuency registration board IFRPS Intercity facility relief planning system IFS (switzerland) integrated telecom service IGS Idenitfy graphic subrepertoire (teletex) IIN Integrated information network IJR Input a jeopardy reason ILC ISDN link controller ILINE IDCU line counts. IM Input mux IM Interface module IMA Additional ineffective machine attempts IMAS Integrated mass announcement system IMC IOS mailbox control IMCAT Input message catalog IMCF Interoffice multiple call forwarding IMD Intermodulation distortion IMM Input message manual IMMU IOS memory management unit IMP Impedance IMP Impules per minute IMP Interpersonal messaging protocol (x.420: p2) IMS Interprocessor message switch IMT Inter-machine trunk IMTS Improved mobile telephone service IMU Input measured ccs usage data IN Intelligent network IN/1 Intelligent network/1 INA Intergrated network access INAP Intelligent network access point INC Incoming trunk groups INC International calling INC International carrier INC SEL Incoming selector INCAS-A Integrated network cost analysis - access INCAS-LT Integrated network cost analysis - local and toll INCAS-S Integrated network cost analysis - shared INCAS/E Integrated network cost analysis system INCAS/I Integrated network cost analysis system - embedded INCIS Integrated network cost information system INCP Incomplete IND Individual INF Information INF Information (SS7: in ISUP) INIT Allocation table initalization INL Inter node link INN Inter node network INQ Complete circuit inquiry INR Information request (SS7: in ISUP) INS (japan) information network system (b64+b16+d8) INT Interrupt (i.e. C/I channel code) INTCCTRL International code control (NTI) INTCHG Interexchange INTEGRIS Integrated results information service INTELSAT International telecommunications satellite consortium INTR Interrupt INW INWATS [code 258(8000-8299)] INWATS Inward wide area telecommunications system INWATS Inward wide area telephone service INWBLKD INWATS returned blocked INWBLKD Inward wide area telecommunications service (INWATS) returned blocked INWBUSY INWATS all lines busy INWCCBL INWATS code control blocked INWDBOV INWATS data base overload INWDBTO INWATS data base timeout INWDSBL INWATS direct signaling blocked INWNNPA INWATS nonpurchased NPA INWNNPA INWATS nonpurchased numbering plan area (NPA) INWNOXL INWATS returned no translation INWONPA INWATS invalid ONPA INWONPA INWATS invalid originating numbering plan area (ONPA) INWOVLD INWATS returned overload INWUNEQ INWATS returned unequipped INWVLIN INWATS vacant line number INWVNXX INWATS vacant NXX IO Inward operator IOAU Input/output access unit (univac) IOC Independent operating company IOC Input/output controler (shelf) IOC Integrated optical circuit IOC International overseas center IOCC International overseas completion center IOCP Input/output configuration process IOCS Input/output control system IODB IDCU on-demand B-channel IOI Secondary input/output interface pack(s) IOM ISDN-oriented modular (architecture and interfaces) IOM2 Extended iom IOMI Input/output microprocessor interface IOP Input-output processor IOP Input/output Processor IOP Input/output driver IOP Input/output processor IOS ISDN operational software IOS Input/output supervisor (IBM) IOS Inventory order system IOSF Input/output shelf assignment IOT Inter-office trunk IOT Interoffice test command (SARTS command) IOT Interoffice testing IOTC International originating toll center IP Information provider IP Inprogress IP Intermediate point IP Internet protocol IPABX ISDN pabx IPAC ISDN pc adapter circuit IPACS Interactive planning & control system IPAT ISDN primary access transceiver IPB Sipb IPBC IOM2 PBC (old name for EPIC) IPC Inter-process communication IPC Interprocess communication IPCS IOS process control system IPCS Installation product costing system IPCS Interactive problem control system IPIB Intelligent personal computer interface board IPIDB IDCU peripheral interface data bus IPL Initial program load IPL Interoffice private line signaling IPL Interoffice private line signaling test (SARTS command) IPLAN Integrated planning and analysis system IPLS InterLATA private line services IPM Impulse per minute IPM Impulses per minute IPM Interruptions per minute IPP IOS protocol part IPP Integrated planning process IPPC Interdepartmental project planning committee IPR Installation performance results system IPS Installation performance results IPS Integrated Provisioning System IPS Integrated provisions system IPX Integrated packet exchange IQS Instant request system IR Incoming register IRBR Integrated resource billing report system IRC International record carrier IRIS Industry relations information system IRLF Incoming register link frame IRM Information resource management IRMC Incoming register marker connector IRO Industry relations operations IROR Internal rate of return IRP Integrated revenue planning IRPC ISDN remote power control psb2120 IRR Internal rate of return system IRRS Interactive request and retrieval system IRS Industrial revenue summary IRT IDCU remote digital terminal IRU Integrated recovery utility (sperry) IS Interrupt set IS/SADQ Interstate special access demand quantification ISA Indicate status application ISAC-P ISDN subscriber access controller ISAC-S ISDN subscriber access controller ISAM Indexed sequential access method ISC Intelligent serial controller ISC International switching center ISC Planintercompany services coordination plan ISC/TE Information systems center for technical education ISCAR Information systems costs analysis reports ISCOM SWBT intercompany service coordination (ISC) order monitor ISCP Integrated service control point ISCP/MSAP ISCP/multi-service application platform ISCP/SPOCK ISCP/service provisioning and on-line creation tool kit software ISDN Integrated services digital network ISF Inquire on a single facility ISG Isolated system grounding ISH Complete circuit inquiry short ISI Industry support layout ISIS Interstate settlements information system ISLM Integrated services line module ISLU Integrated services line unit ISLUCC Integrated services line unit common controller ISLUCD Integrated services line unit common data ISLUHLSC Integrated services line unit high level service circuit ISLUMAN Integrated services line unit metallic access network ISLURG Integrated services line unit ringing generator ISM ISDN switching module ISM Interactive synchronous mode ISMP Industry specific measurement plan ISMS Integrated service management system ISMTL Information systems management training ISN Information systems network ISN Integrated systems network ISNET Interim solution network (Kansas city only) ISO Information systems organization ISO International organization for standardization ISOFC ISDN office totals ISOPDB Information systems organization planning data base ISOSS Intercompany service order switching system ISP Intermediate service part ISPBX Integrated systems PBX ISPC International signaling point code (SS7) ISPF Interactive system productivity facility ISPI ISDN packet interface ISRP Information systems rules panel ISS Integrated switching system ISS Issue ISSANRC Interstate special access non-recurring ISSC Interfunction special service coordination ISSCO Intertoll ISSN Integrated special services network ISSN Intergrated specal services network ISSS ISDN supporting system ISTA Interrupt status register ISUP ISDN user part ISUP ISDN user part (SS7: q.76x) ISUP Integrated services user part IT Inactivity test (SS7: in SCCP) IT Intertandem tie trunk INTER/TRA blocal 1-26 ITAC ISDN terminal adaptor circuit ITC Independent telephone company ITC Interdepartmental training center at dallas-texas for ITD Intertoll dial ITEA Interoffice trunks engineering and administration ITF Integrated test facility ITG Intergrated traffic generator ITIMS Integrated transportation information management system ITIMS/IE Itims/information expert ITM Cable pair item number ITNA Improves thrid number acceptance ITNO Item number ITS Institute of telecommunication science ITS Integrated test system ITS Interactive training system ITSE Incoming trunk service evaluation ITSO Incoming trunk service observation ITSTC Information technology steering committee (cen ITT Idle trunk test ITU International telecommunication union ITU International telecommunications union ITVSE Intermediary transport vendor service center ITW Instructional technology workshop IU Network/port interface unit IUP Installed user program (IBM) IVD Integrated voice data IVP Installation verification procedures IVP Installation verification program IVTS International video teleconferencing service IWF Interworking facility (gateway) IWU Interworking unit (gateway) IX Interactive executive IXC Or icinterexchange carrier IXM Interexchange mileage IZ Interzone J Enter centrex (CTX) or multiline hunt group (MLHG) number JAD Joint application design JAM Jumper activity management JCL Job control language JDC Japan digital cellular JDC Job duties code JDI Job disposition indicator JDIP Jmos/dopac interface process (comptroller system) JE Job evaluation JEC Journal entity code JES Job entry subsystem (IBM) JES Job entry system JES 2 Job entry system 2 (IBM) JES 3 Job entry system 3 (IBM) JET BTL TIRKS jumper evaluation technique JFC Job function code JGF Junctor grouping frame JIB Job information block (VMS) JIM Job information memorandum JIS Jurisdictional interstate services JK Jack JKLAP Jack/key/and lamp access panel JL Jumper length JMOS Job management operations system JMOS/PT JMOS/pricer-tracker JMOS/RPTS JMOS reports JMOSCA Jmos contract administration JMX Jumbogroup multiplex JOSS Job order status system (distribution services system) JOSSVM Job order status system/VM JOVIAL Jule's own version of the international algebraic language JP71 Joint practice 71 JP80 Joint practice 80 JPH Jumper placement history JSC Job status code JSN Junction switch number JSW Junctor switch JTR Jitter JTRS JMOS trouble reporting system (distribution services system) JUICE JMOS user input card entry (distribution services system) K DACS-SRDC K Equipment frame designation K Kilobit KBPS Kilobits per second KCA Key contributor award KCO Keep cost order KD Keyboard display KDROP Key display receive only printer KDT Keyboard display terminal KERMIT Kermit KEY Stop hunt or random make busy hunting KFT Kilofeet KHZ Kilo-hertz KHZ Kilohertz KITSKOTS Kansas inward toll service/Kansas outward toll service KOHM Kilohms KOP Thousands of operations per second KP Key pulse KPR Killer pair report KSDS Key sequence data set (IBM) KSM Create a transaction mask KSR Keyboard send-receive KSU Key service unit KTA Korea telecommunication authority (ROK) KTS Key telephone set KTS Key telephone system KW Keyword L Shift preference (if any) for this work to be performed. L/AOS Legal/advanced office system L2DOWN Level 2 is inoperable. L2QLTY Poor level 2 transmission quality. L3-ERC Layer 3 error control (IOS) L3M Layer 3 mgr. (IOS) LA Local area data channel INTER/TRA blocal 1-26 LA Loop assignment LAC LAN application controller LAC Loop assignment center LAD Label definition LAD Loop activity data LADS Local area data service LADT Local access data transport LADT Local area data transport LAI Line equipment assignment inquiry LAIS Local automatic intercept system LAJMS Ledger and journal maintenance system LAMA Local automatic message accounting LAMA-C Computerized local AMA for No. 5 crossbar LAN Local area network LANMS Light amplified by stimulated emission of radiation LAP Link access protocol LAPB (LAP-B) link access procedure of balanced mode LAPD (LAP-D) link access procedure of D-channels LAPD Link access procedure on the D channel LAPM (LAP-M) link access protocol for modems LAPX Lapb extended (t.71) LARG Lidb access routing guide LASS Local alarm scanning system LASS Local area signaling service LAT Local access termianl (RMS-D1) LATA Local access and transport area LATA Local access and transport areas LATA Local access transport area LATIS Loop activity tracking information system LATIS I/F Loop activity tracking information system interface LATIS/INPUT Locally developed program used to input to the latis system LB Voice-non switched line-service code for LATA access LBBD Loopback B1 LBI Load balance index LBK Loop test (SARTS command) LBK Loopback LBL Online tape label printing LBNCGI LIDB BNS message with call gapping indicator present LBNGM LIDB BNS garbled message LBNMGM LIDB BNS return value missing group or misrouted LBNNAN LIDB BNS return value no translation for an address of such nature LBNNCG LIDB BNS return value network congestion LBNNFL LIDB BNS return value network failure LBNNPG LIDB BNS return value nonparticipating group LBNNSA LIDB BNS return value no translation for this specific address LBNREJ LIDB BNS reject message received LBNSCG LIDB BNS return value subsystem congestion LBNSFL LIDB BNS return value subsystem failure LBNTO LIDB BNS message missed because of timeout LBNUP LIDB BNS message with unexpected reply LBNUUR LIDB BNS return value unequipped user LBO Line buildout LBP Load balance parameters LBR Large business remote LBRV Low bit rate voice LBS Land and building system LBS Load balance system LBS Load balance system (BTL) module of tnds LBST Loopback device signature table LBU Loopback devices signature table LBU Loopback unit LBn Loopback channel bn request (command in IOM2 monitor and EOC) LC Line card LC Line count LC Output line count LC Pending service order count LC Voice-switched line-service code for LATA access LCAMOS Loop cable administration and maintenance operations system (predictor) LCC Line class code LCCIS Local common channel interoffice signaling LCCL Line card cable LCCLN Line card cable narrative LCD List cable summary LCDCGI LIDB CCRD message with call gapping indicator present LCDGM LIDB CCRD garbled message LCDMGM LIDB CCRD return value missing group or misrouted LCDN Last called directory number LCDNAN LIDB CCRD return value no translation for an address of such natur e LCDNCG LIDB CCRD return value network congestion LCDNFL LIDB CCRD return value network failure LCDNPG LIDB CCRD return value nonparticipating group LCDNSA LIDB CCRD return value no translation for this specific address LCDR Local call detail recording LCDREJ LIDB CCRD reject message received LCDSCG LIDB CCRD return value subsystem congestion LCDSFL LIDB CCRD return value subsystem failure LCDTO LIDB CCRD message missed because of timeout LCDUP LIDB CCRD message with unexpected reply LCDUUR LIDB CCRD return value unequipped user LCE Line concentrating equipment frame LCEN Line card equipment number LCI LAN CPU interface LCIE Lightguide cable interconnection equipment LCLOC Line card location LCM Line concentrating module LCMC Line concentrating controller module LCN Logical channel number LCN Logical channel numbers LCOS Line Class of service (GTE) LCP Language conversion program LCP List cable pairs LCR Least cost routing LCR Line concentration ratio LCRMKR Line card remarks LCS.MIT.EDU Telecomm digest archive site on the Internet LCS7 Link controller for signaling system No.7 LCSE Line card service and equipment LCSEN Line card service and equipment narrative LD Load LD Loading division LD Long distance LD Voice switched trunk-service code for LATA access LDBM Listing data base maintenance LDES Long distance experimental schedule LDM Logical data model LDMTS Long distance message telecommunications service LDN Listed directory number LDS Local digital switch LDSU2 Local digital service unit - model 2 LDT Local display terminal LDU Long distance usage analysis LE Leading edge (bsp) LE Line equipment LE Local exchange (contains D-CTL) LE Voice and tone-radio landline-service code for LATA access LEAD Loop engineering assignment data LEAP System testing tool to simulate multiple 3270 users LEAS Lata equal access system LEC Local exchange carrier LED Last entry data LED Light emitting diode LED Light-emitting diode LEE Nac related line equipment transfer order establishment LEFTS Loop electronic forecasting and tracking system LEG Customer training file LEIM Loop electronic inventory module LEIM Loop electronics inventory module LEIS Loop engineering information system (applications) LEN Line equipment number LENCL Line equipment number class LENG Length LERG Local exchange routing guide LET Line equipment transfers LETS Law enforcement teletypewriter service LEV Level LEW Line equipment transfer withdrawal LF Data low-speed-service code for LATA access LF Lease file LF Line Finder LF Line feed LF Line finder LF Load factor LF Low frequance LFACS Loop facilities assignment and control system LFACS Loop facility assignment and control system LFC Load factor calculation LFR Line failure report LFRC Local field reporting code LG Basic data-service code for LATA access LGC Line group controller LGN List hunt groups LH Line hunting (i.252 f) LH Voice and data-psn access trunk-service code for LATA access LI Length indicator (SS7) LI Link interface LIB Line interface board LIDB Line information data base LIDB Line information database LIE Left in equipment LIFECOST Life cycle cost system LIFO Last in LIJ Left In Jumper LIM Less than the specified number of pairs LIN Line LIN Transmit alit data to COSMOS LINCS Lan integrated network communications system LINIS Line and number inventory system LINK Loop interface network LINK1 The basic rate interface transmission extension (BRITE) link one is down LINK2 The BRITE link two is down. LINK3 The BRITE link three is down. LINK4 The BRITE link four is down. LINK5 The BRITE link five is down. LINK6 The BRITE link six is down. LIS Library information system LIST Listen LIT Line insulation test LIT Line insulation testing parameters LIU Lats interface unit LIU Line interface unit LIU Line user interface LJ Voice and data ssn access-service code for LATA access LK Voice and data-ssn-intermachine trunk-service code for LATA access LKNODE Link node LL Logical link LL Long distance terminal line INTER/TRA blocal 1-26 LL Long lines LLC Line load control LLC Low level controller sipx6100 LLD Low level device drivers (IOS) LLDB Location life data base LLF Line link frame LLID Ll identifier LLL Last look logic LLN Line link network LLN Line link network (ess) LLP Link layer protocol (lapd) LLS Local Line Switch (GTE) LME Line module equipment LMMS Local message metering system LMOS Loop maintenance operations system LMOS Loop maintenance operations systemr LMOS F/E Loop maintenance operations system front end LMOS HOST Loop maintenance operations system host LMOS I/F Loop maintenance operating system interface LMS Litigation management system LMS Loop maintenance system LMS/TUM Local measuring system/temporary usage measurement LMT Local maintance operations system LMTS Limits LMU Line multiplexer unit LMX L-multiplex LN Data extension LN Leased network LN Loop normal (on-hook normal) LNA Line and number administration LNA Low noise amplifier LNBAS Call failed due to the query being blocked at the switch LNBN Call failed due to the query being blocked in the CCS network LNG Longitudinal LNS Line number status LO Low threshold LOA Limit operator attempts LOAD Listing of acronym definition LOC Local LOC Local operating company LOC Location of cable on frame LOCAP Low capacitance LOCN Location LOE List originating line equipment LOE Location operating entity LOES Lajms online entry system LOF Lock off-line LOF Loss of frame LOGIC Logistics integrated control system LOGU Logical units assignments LOMS Loop assignment center operations management system LON Lock on-line LONALS Local off-net access lines LP Telephoto/facsimile-service code for LATA access LPA Link pack area LPBK Looped back LPCDF Low profile combined distributing frame LPCDF Low profile conventional distributing frame LPIE Loop plant improvement evaluator LPIE2 Loop plant improvement evaluator 2 LPK Line concentrating equipment line packs LPM Lines per minute LPM Logistic planning module LPS Log/print status LPT Loop test LQ Voice grade customized-service code for LATA access LR Loop reverse (off-hook normal) LR Protection relay-voice grade-service code for LATA access LRAP Long route analysis program LRC Longitudal redundancy check LRC Longitudinal redundancy check LRIA1 Long run incremental analysis i LRISP Long range information systems planning organization LRM Line resource monitor-ims (BMC) LRN Local reference number LROPP Long-rangeoutside plant planning LROT OR LRH Local rotary LRP Long rang planning LRS Lease record system LRS Line repeater station LRSS Long range switching studies LS Local service INTER/TRA blocal 1-26 LS Loop start signaling LS&E Local service and equipment LSA Local security administrator LSA Local subaccount LSB Lower side band LSBS Location specific bypass system LSD&F Local switching demand & facility data base system LSDB Listing service data base LSDF Local switching demand and facility data base system LSDN Local switched digital network LSE Line and station transfer order establishment LSEC Loss of sec (C/I channel code) LSHF Message LAN shelf LSI Large-scale integrated circuitry LSL Loss of signal level (C/I channel code) LSM Load synchronization mechanization LSM Local switching module LSN Logical session number LSO Local service office LSO Local storage option-ims (IBM) LSRP Local switching replacement planning LSRP Local switching replacement planning system LSS Lata switching systems LSS Listing service system LSS Listing services system LSS Loop switching system LSSGR Lata switching systems generic requirements LSSI Local special service inventory LSSR Local special service results LSSU Link state signal unit (SS7) LSSU Link status signal unit LST Line and station transfer LSU Line switch unit LSU Local storage unit LSU Loss of signal level of u interface (C/I channel code) LSUE Lsu error condition (C/I channel code) LSV Latch switch verification LSV Line status verifier LSW Line and station transfer withdrawal LT Lata tandem LT Line termination LT Local terminal LT Long distance terminal trunk INTER/TRA blocal 1-26 LT-S Lt on s bus LT-T Lt on t interface LTAB Line test access bus LTB Last trunk busy LTC Line trunk controler LTC Local test cabinet LTD Local test desk LTD Local test desk (#16 LTD Long term disability LTD Lt disable (C/I channel code) LTERM Logical terminal-ims (IBM) LTF Light terminal frame LTF Lightwave terminal frame LTF Lightwave terminating frame LTF Line trunk frame LTG Line translation group LTG Line trunk group LTI Loop termination identifier LTMA Lightwave terminal multiplex assembly LTMA Lightwave terminating multiplexing assembly LTN List telephone numbers LTOP Long term disability plan LTP Line and trunk peripherals LTP Local test port LTP Loop technology planning LTS Loss test set LTU Line trunk unit LTUC Ltu control LU Line unit LU 6.2 Protocol for appc LU2 Line unit model 2 LUA Link up america tracking LUCHBD Line unit channel board LUCOMC Line unit common control LUHLSC Line unit high level service circuit LUIF Living unit interface file LUM Line utilization monitor-ims (BMC) LUPEX Line unit path exerciser LURR Large user reproduced records system LV Sdlv LVL1ERR Level 1 protocol error. LVL2ERR Level 2 protocol error. LVL3ERR Level 3 protocol error. LVM Line verification module LW-SSS Lightwave system support services by weco LWC Leave word calling LX 2 Local originating LX 2 Local terminating LXE Lightguide express entry LZ Dedicated facility-service code for LATA access M Latest date that this ticket can be loaded. M M(transmit) signal lead M Maintance M Minutes M LETTER Methods letter M O Master office M S Main station M S Mark sense M&P Methods and procedures M-MONEY Maintenance money M-STARS Measurement and statistics tracking and reporting system M/ATR Maritime/aviation tracking reports M/W Microwave M5 Five-minute MA Cellular access trunk 2-way INTER/TRA blocal 1-26 MA Maintenance administrator MA Multiple access (primary) MA02 Status requested MA03 Hourly report of system circuits and units in trouble MA04 Reports condition of system - 1AESS maintenance MA05 Maintenance interrupt count for last hour - 1AESS maintenance MA06 Scanners MA07 Successful switch of duplicated unit (program store etc.) - 1AESS MA08 Excessive error rate of named unit -1AESS maintenance MA09 Power should not be removed from named unit - 1AESS maintenance MA10 Ok to remove paper - 1AESS maintenance MA11 Power manually removed from unit - 1AESS maintenance MA12 Power restored to unit - 1AESS maintenance MA13 Indicates central control active - 1AESS maintenance MA15 Hourly report of # of times interrupt recovery program acted - ma MA17 Centrex data link power removed - 1AESS maintenance MA21 Reports action taken on mac-rex command -1AESS maintenance msg MA23 4 minute report- emergency action phase triggers are inhibited MAB Metallic access bus MAC Machine administration center MAC Major accounting center MAC Mechanized assignment control (BTL) MAC Missed appointment code MAC Monitor analysis & control of fa standard values MACBS Multi-access cable billing system MACS Major apparatus and cable system MACS Mechanized analysis of customer systems MACS(DS) Major apparatus control system (dist. svcs) MADN Multiple access directory numbers MADPE Address parity error MAEC Media access error counter MAI Multiple access interface (univac) MAILLOG Manager electronic mail logging system MAINT Maintenance MAINT Maintenance handler MAL Maintance action limits MAL Manual assignment list MALRU Mechanized automatic line record update MALT Maintence transmission action limit table MAMA Mechanized automatic message accounting MAMA Mobile automatic message accounting MAN Manual MAN Metropolitan area network MAN Miscellaneous account number MAP Maintance and administration position MAP Maintenance and administration position MAP Maintenance and administrative position (NTI) MAP Management assessment program MAP Manual assignment parameters MAP Manufacturing automation protocol MAP Mobile application part MAPCI Map command interpreter (NTI) MAPPER Maintain and prepare executive reports MAPS Mechanized accounts payable system MAPS Modeling and planning system (BTL) MAPSS Maintenance & analysis plan for special services MAPSS Maintenance and analysis plan for special services MAQ Manual assignment file inquiry MAR Market analysis report (BTL) MAR Microprogram address register MAR Multi-alternate route MARC Market analysis of revenue and customers system MARC Market analysis of revenues and customers MARC/CAPS Market analysis of personnel and customer analysis profile MARCH A computer system MARG Margin Parameter MARK Mechnized Assiment Record Keeping System (GTE COSMOS) MARK IV General purpose information storage and retrieval system MARS Mechanized automative repair system MARS Multiple access repair system MAS Interfacesmessage analysis sampling plan MAS Main store MAS Mass announcement system (900 service) MAS Memory administration system MASB Mas bus MASC Mas controller MASM Mas memory MAST Mail analysis and sales tracking MAT Manual assistance tag MAT Metropolitan area trunk MATFAP Metropolitan area transmission facility analysis program MATR Maritime/aviation tracking system MATR Modified answering time recorder MATS Marketing access tracking system MATS Mechanized analysis of traffic studies system MAVIS McDonnel Douglas automatic voice information system (model 1018t) MAX Maximum MAX Maximum messages MAX Maximum percentage value of entity fill or maximum ccs value MAXS Metallic automatic cross-connected system MAY Modify an assembly MB Make busy MB Make-busy or made-busy MB/S Megabits per second. MBO Management by objectives MBP Metallic bypass pair MBPS Megabits per second MBX Measured branch exchange MBYTE Megabyte MC Machine congestion MC Maintance connector MC Maintenance center MC Maintenance circuit MC Marker class of service MC Memory controller MCA Misrouted centralized automatic message accounting (MDII) MCAS Material cable administrative system MCB Message control bank (sperry) MCC Maintance control center MCC Maintenance control center MCC Manual camera control MCC Master control center MCC Minicuster controller MCCI Mechanized customer contact index MCCRAP Master control center trouble report analysis plan MCCS Mechanized calling card service MCE Establish a maintenance change ticket MCH Maintenance channel MCH Manually change hunt MCHB Maintenance channel buffer MCI Malicious call identification (i.251 g) MCI Microwave communications incorporated MCIAS Multi-channel intelligent announcement system MCIAS Multi-channel intercept announcement system MCINT Mate control interrupt MCL Maintenance change list MCN Machine congestion level # where MCI=machine congestion level MCN Master control number MCN Metropolitan campus network MCOS Multiplexer out of synchronization MCP Mechanized credit provisioning system MCR Establish a maintenance change repair MCR Mass call register MCS Master cpu subsystem MCS Meeting communications service MCS Multiple console support MCTAP Mechanized cable transfer administration plan MCTRAP Mechanized customer trouble report analysis plan MCTSI Module controller/time slot interchange MCTSI Module controller/time-slot interchange unit MCW Maintenance change ticket withdrawal MD SS7fe message distributor MD/RS Mechanized denial/restoral system MDACS Modular digital access control system MDC Manually disconnect a working circuit MDC Marker distributor control MDC Materials distribution center MDC Meridian digital centrex MDCMES Management development center mechanized enrollment system MDF Main distributing frame MDF Main distribution frame MDII Machine detected interoffice irregularities MDII Machine-detected interoffice irregularity MDIS Marketing data interface system MDLIE DLI interface error MDOG Mechanized disbursement of gasoline MDP SS7 fe message distribution protocol MDR Mechanized draft reconciliation MDR Message detail record MDS Message design systems MDT Management development/training MDU Marker decoder unit MDX Modular digital exchange ME Management employment ME & ASSM Management employment & assessment ME CORP Corporation management employment MEANS Model for economic analysis of network service MEAS Measure MEASMT Measurement MEC Maintenance engineer center MEC Manually establish a circuit MEC Mobile equipment console MECA Mechanization of engineering & circuit provisioning MECAB Multi exchange carrier access billing MECCRRF Mechanized credit reference system MECH More efficient call handling MECOD Multiple exchange carrier ordering and design MED Medium threshold MED Multipoint end-link data MEDPLUS Medicare part b reimbursement payments MEDS Mechanized expense distribution system MEF Master employee file MELD Mechanized engineering and layout for distributing frames MEP Medical expense plan MERITS Measurement of exchange records integrity through sampling MERP Mechanization of estimate results plan MERS Most economic route selection MERT Master employee record tape MESA Mechanized edits of street address MESS Message MET Multibuton electronic telephone MET Multibutton electronic telephone METASX Metallic access MF Mainboard firmware (IOS) MF Multi frame MF Multi frequency MF Multifrequency MF Multiplexer frame MFAS Mechanized forecasting and analysis system MFC Master file directory (VMS-catalog of UFDS) MFC Modular feature construction MFC Multiple frame operation control (IOS) MFENET Magnetic fusion energy network MFFAN Miscellaneous frame (CM2 offices only) MFJ Modification of final judgement MFJ Modification of final judgment MFJ Modified final judgment (consent decree) MFR Discmanufacture discontinued MFR Mechanized force report MFR Multi-frequency receivers MFRS Management force reporting system MFS Message formatting service-ims (IBM) MFT Metallic facility terminal MFT Multiprogramming with a fixed number of tasks MG Marker group MG Marker group number MG Mastergroup MGB Main ground bus MGB Master ground bar MGBAF Maintenance group blocking acknowledgment failure MGR Manager MGSC Message service customer counts MGSG Message service multi-line hunt MGT Mastergroup translator MGUAF Maintenance group unblocking acknowledgment failure MH Modified huffman code (fax) MHD Moving head disk MHD Moving head disk drive(s) used in the am. MHDC Moving head disk control MHDDC Moving head disk data/clock MHS Message handling service MHS Message handling system MHZ Megahertz MI Machine interface MI Message interface on the MI Swbt minimal input MIAS Marketing information analysis system MICA Mechanized intercompany contract administration MICC Minicluster controller MICE Modular integrated communications environment MICI Mechanized independent company input MICR Minimal input customer records MICRO/TEL Micro/tel force analyzer MICS BTL maintenance space inventory control system MICU Message interface and clock unit MICU Message interface clock unit MID Master interim design MIFM Mechanized installation force management MIG Mechanized interval guide system MIIS Management inventory information system MIMIC Mts-wats intrastate model for incremental cost MIN Minimum MIN Minimum percentage value of entity fill or minimum CCS value MIN Mobile identification number MINX Multimedia information network exchange MIOIO I/O invalid operation error MIOLE I/O lock error MIOPE I/O bus parity error MIOTO I/O timer time out error MIOUE I/O unlock error MIP Microprocessor interface port MIPP Management surplus income protection plan MIPS Million instructions per second MIR Micro-instruction register MIRA Maintenance input request administrator . MIRA Mark iv information retrieval aid MIS Management information system MIS Mechanized intercepting system MIS/C Management information system/computer MISC Miscellaneous MISCF Miscellaneous frame MISS Management information staffing system MITS Microcomputer interactive test system MIU Metallic interdace unit MIZAR Management job evaluation MJEC Multiple job function codes MJF Modified final judgement MJU Multipoint junction unit MKBUSY Make busy. MKR Marker MKTG Marketing ML Matching loss MLAC Manual loop assignment center MLC Miniline card MLC