Date: Wed, 22 Nov 89 01:14:16 CST
From: Randy Tischler 
To: ptownson@eecs.nwu.edu
Message-ID:  <8911220124.aa25802@delta.eecs.nwu.edu>
Resent-Date:  Wed, 22 Nov 89 1:29:12 CST
Resent-From:  ptownson@eecs.nwu.edu
Resent-To:  telecom@eecs.nwu.edu

                       ==Phrack Inc.==
 
             Volume Two, Issue 20, File #11 of 12

Metal Shop Private's -- Acronyms

3ACC ... 3A Central Control
5XB ... COER 5 X-Bar Central Office Equipment Reports system
A/D ... Analog to Digital
AAX ... Automated Attendant eXchange
ABATS ... Automatic Bit Access Test System
ABHC ... Average Busy Hour Calls
ABS ... Alternative Billing Service
ABSBH ... Average Busy Season Busy Hour
ACB ... Annoyance Call Bureau
ACC ... Audio Communications Controller
ACCS ... Automated Calling Card Service
ACD ... Automatic Call Distributor
ACDA ... Automatic Call Disposition Analyzer
ACE ... Automatic Calling Equipment
ACF ... Advanced Communications Functions
ACH ... Attempt per Circuit per Hour
ACOF ... Attendant Control Of Facilities
ACP ... ACtion Point
ACSNET ... Acedemic Computing Services NETwork
ACSU ... Advanced t-1 Channel Service Unit
ACTS ... Automated Coin Toll Service
ACU ... Alarm Control Unit
ACU ... Automatic Calling Unit
ADCCP ... Advanced Data Communications Control Procedure
ADCI ... Automatic Display Call Indicator
ADN ... Abbreviated Dialing Number
ADS ... Advanced Digital System
ADS ... Audio Distribution System
ADS ... Auxilary Data System
AFACTS ... Automatic FACilities Test System
AFADS ... Automatic Force Adjustment Data System
AFSK ... Automatic Frequency Shift Keying
AIC ... Automatic Intercept Center
AICC ... Automatic Intercept Communications Controller
AIOD ... Automatic Identificated Outward Dialing
AIS ... Automatic Intercept System
ALBO ... Automatic Line BuildOut
ALFE ... Analog Line Front End
ALGOL ... ALGOrhythmic computer Language
ALI ... Automatic Location Indentification
ALIT ... Automatic Line Insulation Testing
ALRU ... Automatic Line Record Update
ALS ... Automated List Service
AM ... Administrative Module
AM ... Amplitude Modulation
AMA ... Automatic Message Accounting
AMACS ... AMA Collection System
AMARC ... AMA Recording Center
AMASE ... AMA Standard Entry
AMAT ... AMA Transmitter
AMATPS ... AMA TeleProcessing System
AMERITECH ... AMERican Information TECHnologies
AMPS ... Advanced Mobile Phone Service
AN ... Associated Number
ANA ... Automatic Number Announcement
ANC ... All Number Calling
ANI ... Automatic Number Identification
ANIF ... Automatic Number Identification Failure
ANSI ... American National Standards Institute
AOSS ... Auxilliary Operator Service System
AP ... Attached Processor
APC ... AMARC Protocol Converter
APS ... Automatic Protection Switch
AR ... Alarm Report
ARC ... Audio Response Controller
ARIS ... Audichron Recorded Information System
ARS ... Alternate Route Selection
ARSB ... Automated Repair Service Bureau
ARU ... Audio Response Unit
ASCII ... American Standard Code for Information Interchange
ASOC ... Administrative Service Oversight Center
ASPEN ... Automatic System for Performance Evaluation of the Network
AT ... Access Tandem
AT&T ... American Telephone and Telegraph
ATB ... All Trunks Busy
ATC ... Automatic Transmission Control
ATH ... Abbreviated Trouble History
ATI ... Automatic Test Inhibit
ATIS ... Automatic Transmitter Identification System
ATM ... Automatic Teller Machine
ATMS ... Automated Trunk Measurement System
ATP ... All Tests Pass
ATR ... Alternate Trunk Routing
ATRS ... Automated Trouble Reporting System
ATTC ... Automatic Transmission Test and Control circuit
ATTCOM ... AT&T COMmunications
ATTIS ... AT&T Information System
AUDIX ... AUDio Information eXchange
AUTODIN ... AUTOmatic DIgital Network
AUTOSEVCOM ... AUTOmatic SEcure Voice COMmunications
AUTOVON ... AUTOmatic VOice Network
AUXF ... AUXillary Frame
AVD ... Alternate Voice Data
B6ZS ... Bipolar with 6 Zero Subsitution
B911 ... Basic 911
BAMAF ... BELLCORE AMA Format
BANCS ... Bell Administrative Network Communications System
BAPCO ... Bellsouth Advertising & Publishing COmpany
BCC ... Blocked Call Cleared
BCD ... Binary Coded Decimal
BCD ... Blocked Call Delayed
BCS ... Batch Change Supplement
BDT ... Billing Data Transmitter
BEF ... Band Elimination Filter
BELLCORE ... BELL COmmunications REsearch
BER ... Bit Error Rate
BERT ... Bit Error Rate Test
BETRS ... Basic Exchange Telecommunications Radio Service
BHC ... Busy Hour Calls
BISP ... Business Information System Program
BITNET ... Because-It's-Time NETwork
BL/DS ... Busy Line/Don't Answer
BLF ... Busy Line Field
BLS ... Business Listing Service
BLV ... Busy Line Verification
BNS ... Billed Number Screening
BOC ... Bell Operating Company
BOR ... Basic Output Report
BORSCHT ... Battery, Overvoltage, Ringing, Supervision, Coding, Hybrid Test
ing BOS ... Business Office Supervisor
BOSS ... Billing and Order Support System
BOT ... Beginning Of Tape
BPI ... Bits Per Inch
BPOC ... Bell Point Of Contact
BPS ... Bits Per Second
BPSS ... Basic Packet-Switching Service
BRAT ... Business Residence Account Tracking system
BRCS ... Business Residence Custom Service
BRI ... Basic Rate Interface
BRM ... Basic Remote Module
BS ... Banded Signaling
BSA ... Basic Serving Arrangements
BSBH ... Busy Season Busy Hour
BSC ... Business Service Center
BSCM ... BiSynchronous Communications Module
BSE ... Basic Service Elements
BSF ... Bell Shock Force
BSOC ... Bell Systems Operating Company
BSP ... Bell System Practice
BSRFS ... Bell System Reference Frequency Standard
BST ... Basic Services Terminal
BSTJ ... Bell System Technical Journal
BT ... Bus Terminator
BTAM ... Basic Telecommunications Access Message
BTL ... Bell Telephone Laboratories
BTN ... Billing Telephone Number
BTU ... British Thermal Unit
BVA ... Billing Validation Application
BVC ... Billing Validation Center
BWM ... Broadcast Warning Message
BWT ... Broadcast Warning TWX
BWTS ... BandWidth Test Set
CA ... CAble
CABS ... Carrier Access Billing System
CAC ... Calling-card Authorization Center
CAC ... Carrier Access Code
CAC ... Circuit Administration Center
CAC ... Customer Administration Center
CAD ... Computer-Aided Dispatch
CADV ... Combined Alternate Data/Voice
CAI ... Call Assembly Index
CAIS ... Colocated Automatic Intercept System
CALRS ... Centralized Automatic Loop Reporting System
CAMA ... Centralized Automatic Message Accounting
CAROT ... Centralized Automatic Reporting On Trunks
CAS ... Circuit Associated Signaling
CAS ... Computerized Autodial System
CAT ... Craft Access Terminal
CATLAS ... Centralized Automatic Trouble Locating and Analysis System
CBS ... CrossBar Switching
CBX ... Computerized Branch eXchange
CC ... Central Control
CC ... Common Control
CC ... Country Code
CCC ... Central Control Complex
CCC ... Computer Control Center
CCH ... Connections per Circuit per Hour
CCIR ... Comite' Consultatif International des Radio Communications
CCIS ... Common Channel Interoffice Signaling
CCITT ... Comite' Consultatif International Telegraphique et Telephonique
CCNC ... Common Channel Network Controller
CCNC ... Computer/Communications Network Center
CCR ... Customer-Controlled Reconfiguration
CCS ... Common Channel Signaling
CCS ... Hundred (C) Call Seconds
CCSA ... Common-Control Switching Arrangement
CCT ... Central Control Terminal
CCTAC ... Computer Communications Trouble Analysis Center
CCU ... COLT Computer Unit
CCV ... Calling Card Validation
CDA ... Call Data Accumulator
CDA ... Coin Detection and Announcement
CDAR ... Customer Dialed Account Recording
CDCF ... Cumulative Discounted Cash Flow
CDF ... Combined Distributing Frame
CDI ... Circle Digit Identification
CDO ... Community Dial Office
CDPR ... Customer Dial Pulse Receiver
CDR ... Call Dial Rerouting
CDS ... Craft Dispatch System
CDT ... Call Data Transmitter
CEF ... Cable Entrance Facility
CEI ... Comparably Efficient Interconnection
CEV ... Controlled Environment Vault
CF ... Coin First
CFCA ... Communications Fraud Control Association
CFR ... Code of Federal Regulations
CGN ... Concentrator Group Number
CIC ... Carrier Identification Code
CICS ... Customer Information Control System
CII ... Call Identity Index
CIS ... Customized Intercept Service
CLASS ... Centralized Local Area Selective Signaling
CLASS ... Custom Local Area Signaling Service
CLDN ... Calling Line Directory Number
CLEI ... Common-Language Equipment Identification
CLI ... Calling Line Ident
CLID ... Calling Line IDentification
CLLI ... Common-Language Location Identification
CMAC ... Centralized Maintenance and Administration Center
CMC ... Construction Maintenance Center
CMDF ... Combined Main Distributing Frame
CMDS ... Centralized Message Data System
CMS ... Call Management System
CMS ... Circuit Maintenance System
CMS ... Communications Management Subsystem
CMS ... Conversational Monitoring System
CMT ... Cellular Mobile Telephone
CMU ... COLT Measurement Unit
CN ... Change Notice
CN/A ... Customer Name/Address
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
CO ... Central Office
COAM ... Customer Owned And Maintained
COC ... Circuit Order Control
COCOT ... Customer-Owned Coin-Operated Telephone
CODCF ... Central Office Data Connecting Facility
CODEC ... COder-DECoder
COE ... Central Office Equipment
COEES ... COE Engineering System
COLT ... Central Office Line Tester
COMSAT ... COMmunications SATellite
CONN ... CONNector
CONTAC ... Central Office NeTwork ACcess
CONUS ... CONtinental United States
CORNET ... CORperate NETwork
COSMIC ... COmmon Systems Main InterConnection frame system
COSMOS ... COmputerized System for Mainframe OperationS
COT ... Central Office Terminal
CP ... Control Program
CPC ... Cellular Phone Company
CPC ... Circuit Provisioning Center
CPD ... Central Pulse Distributor
CPE ... Customer-Premises Equipment
CPH ... Cost Per Hour
CPI ... Computer Private branch exchange Interface
CPM ... Cost Per Minute
CPMP ... Carrier Performance Measurement Plan
CPU ... Central Processing Unit
CRAS ... Cable Repair Administrative System
CRC ... Customer Record Center
CRC ... Cyclic Redundancy Check
CREG ... Concentrated Range Extension with Gain
CRFMP ... Cable Repair Force Management Plan
CRIS ... Customer Record Information System
CRS ... Centralized Results System
CRSAB ... Centralized Repair Service Answering Bureau
CRT ... Cathode Ray Tube
CSA ... Carrier Serving Area
CSACC ... Customer Service Administration Control Center
CSAR ... Centralized System for Analysis Reporting
CSC ... Cell Site Controller
CSDC ... Circuit Switched Digital Capability
CSNET ... Computer Science NETwork
CSO ... Central Services Organization
CSS ... Computer Sub-System
CSU ... Channel Service Unit
CTC ... Central Test Center
CTM ... Contac Trunk Module
CTMS ... Carrier Transmission Measuring System
CTO ... Call Transfer Outside
CTSS ... Cray Time Sharing System
CTT ... Cartridge Tape Transport
CTTC ... Cartridge Tape Transport Controller
CTTN ... Cable Trunk Ticket Number
CU ... Control Unit
CU ... Customer Unit
CU/TK ... Common Update/EQuipment system
CUCRIT ... Capital Utilization CRITeria
CVR ... Compass Voice Response
CWC ... City-Wide Centrex
D/A ... Digital to Analog
DA ... Directory Assistance
DACS ... Digital Access Cross-connect System
DACS ... Directory Assistance Charging System
DAIS ... Distributed Automatic Intercept System
DARC ... Division Alarm Recording Center
DARU ... Distributed automatic intercept system Audio Response Unit
DAS ... Directory Assistance System
DAS ... Distributor And Scanner
DAS-WDT ... Distributor And Scanner-Watch Dog Timer
DASD ... Direct Access Storage Device
DAV ... Data Above Voice
DB ... Decibel
DBA ... Data Base Administrator
DBAC ... Data Base Administration Center
DBAS ... Data Base Administration System
DBM ... DataBase Manager
DBS ... Duplex Bus Selector
DCCS ... DisContiguous Shared Segments
DCE ... Data Circuit-terminating Equipment
DCH ... D Channel Handler
DCL ... DEC Control Language
DCLU ... Digital Carrier Line Uint
DCM ... Digital Carrier Module
DCMS ... Distributed Call Measurement System
DCMU ... Digital Concentrator Measurement Unit
DCP ... Duplex Central Processor
DCPR ... Detailed Contuing Property Record (PICS/DCPR)
DCPSK ... Differential Coherent Phase-Shift Keying
DCS ... Digital Crosconnect System
DCT ... Digital Carrier Trunk
DCTN ... Defense Commercial Telecommunications Network
DCTS ... Dimension Custom Telephone Service
DDC ... Direct Department Calling
DDD ... Direct Distance Dialing
DDN ... Defense Data Network
DDS ... Digital Data Service
DDS ... Digital Data System
DDS ... Digital Dataphone Service
DDX ... Distributed Data eXchange
DEC ... Digital Equipment Corporation
DERP ... Defective Equipment Replacement Program
DES ... Data Encryption Standard
DEW ... Distant Early Warning (line)
DFI ... Digital Facility Interface
DFMS ... Digital Facility Management System
DIC ... Digital Interface Controller
DID ... Direct Inward Dialing
DIF ... Digital Interface Frame
DIM ... Data In the Middle
DIP ... Dual In-line Package
DISA ... Direct Inward System Access
DIU ... Digital Interface Unit
DLC ... Digital Loop Carrier
DLCU ... Digital Line Carrier Unit
DLL ... Dial Long Lines
DLS ... Digital Link Service
DLTU ... Digital Line/Trunk Unit
DLU-PG ... Digital Line Unit-Pair Gain
DM ... Delta Modulation
DMA ... Direct Memory Access
DMI ... Digital Multiplexed Interface
DML ... Data Manipulation Logic
DMS ... Data Management System
DMS ... Digital Multiplexed System
DMU ... Data Manipulation Unit
DN ... Directory Number
DNC ... Dynamic Network Controller
DNHR ... Dynamic Non Hierarchical Routing
DNIC ... Data Network Identification Code
DNR ... Dialed Number Recorder
DNX ... Dynamic Network X-connect
DOC ... Dynamic Overload Control
DOCS ... Display Operator Console System
DOJ ... Department Of Justice
DOM ... Data On Master group
DOTS ... Digital Office Timing Supply
DOV ... Data Over Voice
DP ... Demarcation Point
DP ... Dial Pulse
DPAC ... Dedicated Plant Assignment Center
DPC ... Destination Point Code
DPE ... Data Path Extender
DPN-PH ... Data Packet Network-Packet Handler
DPP ... Discounted Payback Period
DPSK ... Differential Phased-Shift Keying
DR ... Data Ready
DR ... Data Receive
DRMU ... Digital Remote Measurement Unit
DS ... Digital carrier Span
DS ... Digital Signal
DS ... Direct Signal
DSBAM ... Double-SideBand Amplitude Module
DSDC ... Direct Service Dial Capability
DSI ... Digital Speech Interpolation
DSN ... Digital Signal (level) N
DSP ... Digital Signal Processor
DSR ... Dynamic Service Register
DSS ... Data Station Selector
DSU ... Data Service Unit
DSX ... Digital System X-connect
DT ... Data Transmit
DT ... Di-group Terminal
DTAS ... Digital Test Access System
DTC ... Di-group Terminal Controller
DTC ... Digital Trunk Controller
DTE ... Data Terminal Equipment
DTF ... Dial Tone First
DTG ... Direct Trunk Group
DTIF ... Digital Transmission Interface Frame
DTMF ... Dual Tone Multi Frequency
DTU ... Di-group Terminal Unit
DUV ... Data Under Voice
DVX ... Digital Voice eXchange
E&M ... rEceive & transMit/Ear & Mouth signaling
E-COM ... Electronic Computer Originated Mail
E911 ... Enhanced 911
EADAS ... Engineering and Administrative Data Acquisition System
EADAS/NM ... EADAS/Network Management
EAEO ... Equal Access End Office
EARN ... European Academic Research Network
EAS ... Extended Announcement System
EAS ... Extended Area Service
EASD ... Equal Access Service Date
EBCDIC ... Extended Binary Coded Decimal Interexchange Code
ECAP ... Electronic Customer Access Program
ECC ... Enter Cable Change
ECCS ... Economic C (hundred) Call Seconds
ECF ... Enhanced Connectivity Facility
ECPT ... Electronic Coin Public Telephone
ECS ... Electronic Crosconnect System
EDAC ... Electromechanical Digital Adapter Circuit
EDI ... Electronic Data Interchange
EDP ... Electronic Data Processing
EDSX ... Electronic Digital Signal X-connect
EECT ... End-to-End Call Trace
EEDP ... Expanded Electronic tandem switching Dialing Plan
EEHO ... Either End Hop Off
EEI ... Equipment-to-Equipment Interface
EFRAP ... Electronic Feeder Route Analysis Program
EIA ... Electronics Industries Assotiation
EIS ... Expanded Inband Signaling
EISS ... Economic Impact Study System
EKTS ... Electronic Key Telephone Sets
EML ... Expected Measured Loss
EMS ... Expanded Memory Specification
ENFIA ... Exchange Network Facility for Interstate Access
EO ... End Office
EOE ... Electronic Order Exchange
EOS ... Extended Operating System
EOTT ... End Office Toll Trunking
EPL ... Electronic switching system Program Language
EPROM ... Erasable Programmable Read-Only Memory
EPSCS ... Enhanced Private Switched Communication Service
ER ... Error Register
ERAR ... Error Return Address Register
EREP ... Environmental Recording Editing and Printing
ERL ... Echo Return Loss
ERP ... Effective Radiated Power
ERU ... Error Return address Update
ESAC ... Electronic Surveillance Assistance Center
ESB ... Emergency Service Bureau
ESF ... Extended SuperFrame
ESL ... Emergency Stand-Alone
ESN ... Electronic Serial Number
ESN ... Electronic Switched Network
ESP ... Enhanced Service Provider
ESS ... Electronic Switching System
ESSX ... Electronic Switching Systen eXchange
ETAS ... Emergency Technical ASsistance
ETF ... Electronic Toll Fraud
ETN ... Electronic Tandem Network
ETS ... Electronic Tandem Switching
ETS ... Electronic Translation System
ETSACI ... Electronic Tandem Switching Adminstration Channel Interface
ETSSP ... ETS Status Panel
FA ... Fuse Alarm
FACS ... Facilities Assignment and Control System
FAR ... Federal Acquisition Regulation
FAST ... First Application System Test
FAT ... File Allocation Table
FCAP ... Facility CAPacity
FCC ... Federal Communications Commission
FCC ... Forward Command Channel
FCG ... False Cross or Ground
FCS ... File Control Systemction
FCS ... Frame Check Sequence
FDM ... Frequency-Division Multiplexing
FDP ... Field Development Program
FDX ... Full DupleX
FED ... Far End Data
FEMF ... Foreign Electro-Motive Force
FEPS ... Facility and Equipment Planning System
FEV ... Far End Voice
FGA ... Feature Group A
FGB ... Feature Group B
FGC ... Feature Group C
FGD ... Feature Group D
FIFO ... First In, First Out
FIOC ... Frame Input/Output Controller
FIP ... Facility Interface Processor
FIPS ... Federal Information Processing Standards
FM ... Frequency Modulation
FMAC ... Facility Maintenance And Control
FNPA ... Foreign Numbering Plan Area
FOC ... Fiber Optic Communications
FON ... Fiber Optics Network
FR ... Flat Rate
FRS ... Flexible Route Selection
FSK ... Frequency Shift Keying
FTG ... Final Trunk Group
FTP ... File Transfer Protocol
FTS ... Federal Telecommunications System
FX ... Foreign eXchange
GBS ... Group Bridging Service
GCS ... Group Control System
GEISCO ... General Electric Information Services COmpany
GHZ ... GigaHertZ
GID ... Group ID
GND ... GrouND
GOS ... Grade Of Service
GP ... Group Processor
GPIB ... General Purpose Interface Bus
GRD ... GRounD
GRP ... MOD GRouP MODulator
GSA ... General Services Administration
GSAT ... General telephone and electronics SATellite corporation
GTC ... General Telephone Company
GTE ... General Telephone Electronics
GTT ... Global Title Transmission
HCSDS ... High-Capacity Satellite Digital Service
HCTDS ... High-Capacity Terrestrial Digital Service
HDLC ... High-level Data Link Control
HDTV ... High Definition TV
HDX ... Half DupleX
HEAP ... Home Energy Assistance Program
HEHO ... High End Hop Off
HIC ... Hybrid Integrated Circuit
HNPA ... Home Numbering Plan Area
HNS ... Hospitality Network Service
HOBIC ... HOtel Billing Information Center
HOBIS ... HOtel Billing Information System
HP ... Hewlett-Packard
HPO ... High Performance Option
HSSDS ... High-Speed Switched Digital Service
HU ... High Usage
HUTG ... High Usage Trunk Group
HZ ... HertZ
I&M ... Installation & Maintenance
I/O ... Input/Output
IB ... Instruction Buffer
IBN ... Integrated Business Network
IC ... Independent Carrier
IC ... Inter-exchange Carrier
IC ... Inter-LATA Carrier
ICAN ... Individual Circuit ANalysis
ICC ... Interstate Commerce Commission
ICD ... Interactive Call Distribution
ICLID ... Individual Calling Line ID
ICM ... Integrated Call Management
ICSC ... Inter-LATA Customer Service Center
IDDD ... International Direct Distance Dialing
IDF ... Intermediate Distributing Frame
IDS ... Internal Directory System
IDVC ... Integrated Data/Voice Channel
IEEE ... Institute of Electrical and Electronics Engineers
IF ... Intermediate Frequency
IFRPS ... Intercity Facility Relief Planning System
IIN ... Integrated Information Network
IM ... Interface Module
IMAS ... Integrated Mass Announcement System
IMM ... Input Message Manual
IMT ... Inter-Machine Trunk
IMTS ... Improved Mobile Telephone Service
IN ... Intelligent Network
INC ... InterNational Carrier
INL ... Inter Node Link
INN ... Inter Node Network
INTELSAT ... INternational TELecommunications SATellite consortium
INWATS ... INward Wide Area Telephone Service
IO ... Inward Operator
IOC ... Input/Output Controller
IOCC ... International Overseas Completion Center
IOP ... Input-Output Processor
IOT ... Inter-Office Trunk
IP ... Information Provider
IPCS ... Interactive Problem Control System
IPL ... Initial Program Load
IPLAN ... Integrated PLanning And Analysis
IPM ... Impulses Per Minute
IPM ... Interruptions Per Minute
IPX ... Integrated Packet eXchange
IRC ... International Record Carrier
IROR ... Internal Rate Of Return
IS ... Interrupt Set
ISC ... International Switching Center
ISDN ... Integrated Service Digital Network
ISLM ... Integrated Services Line Module
ISLU ... Integrated Services Line Unit
ISN ... Information Systems Network
ISN ... Integrated Systems Network
ISO ... International Organization for Standardization
ISS ... Integrated Switching System
ISSN ... Integrated Special Services Network
ISUP ... Integrated Services User Part
ITS ... Institute of Telecommunication Science
ITSO ... Incoming Trunk Service Observation
ITU ... International Telecommunications Union
IVP ... Installation Verification Program
IVTS ... International Video Teleconferencing Service
IX ... Interactive eXecutive
IXM ... IntereXchange Mileage
JCL ... Job Control Language
JES ... Job Entry System
JIM ... Job Information Memorandum
JMX ... Jumbogroup MultipleX
JSN ... Junction Switch Number
JSW ... Junctor SWitch
K ... Kilobit
KBPS ... KiloBits Per Second
KDT ... Keyboard Display Terminal
KFT ... KiloFeeT
KHZ ... KiloHertZ
KP ... Key Pulse
KSR ... Keyboard Send-Receive
KTS ... Key Telephone Set
KTS ... Key Telephone System
LAC ... Loop Assignment Center
LADT ... Local Access Data Transport
LAIS ... Local Automatic Intercept System
LAMA ... Local Automatic Message Accounting
LAN ... Local Area Network
LAP ... Link Access Protocol
LAPD ... Link Access Procedure on the D channel
LASS ... Local Area Signaling Service
LATA ... Local Access and Transport Area
LATIS ... Loop Activity Tracking Information System
LBO ... Line Buildout
LBS ... Load Balance System
LCAMOS ... Loop CAble Maintenance Operation System
LCCIS ... Local Common Channel Interoffice Signaling
LCCL ... Line Card CabLe
LCCLN ... Line Card Cable Narrative
LCDN ... Last Called Directory Number
LCIE ... Lightguide Cable Interconnection Equipment
LCLOC ... Line Card LOCation
LCN ... Logical Channel Numbers
LCR ... Least Cost Routing
LCRMKR ... Line Card ReMarKs, Retained
LCSE ... Line Card Service and Equipment
LCSEN ... Line Card Service and Equipment Narrative
LDMTS ... Long Distance Message Telecommunications Service
LEAS ... LATA Equal Access System
LEC ... Local Exchange Carrier
LED ... Light-Emitting Diode
LENCL ... Line Equipment Number CLass
LF ... Line Finder
LFACS ... Loop Facilties Assignment And Control System
LIFO ... Last In, First Out
LLN ... Line Link Network
LMMS ... Local Message Metering System
LMOS ... Loop Maintenace Operations System
LOC ... Local Operating Company
LOCAP ... LOw CAPacitance
LOF ... Lock OFf-line
LON ... Lock ON-line
LPCDF ... Low Profile Combined Distributing Frame
LRAP ... Long Route Analysis Program
LRC ... Longitudal Redundancy Check
LRS ... Line Repeater Station
LRSS ... Long Range Switching Studies
LSB ... Lower Side Band
LSI ... Large-Scale Integrated circuitry
LSRP ... Local Switching Replacement Planning system
LSS ... Loop Switching System
LSV ... Line Status Verifier
LTAB ... Line Test Access Bus
LTC ... Local Test Cabinet
LTD ... Local Test Desk
LTF ... Lightwave Terminating Frame
LTF ... Line Trunk Frame
LTG ... Line Trunk Group
LTS ... Loss Test Set
LXE ... Lightguide eXpress Entry
M/W ... MicroWave
MA ... Maintenance Administrator
MACBS ... Multi-Access Cable Billing System
MADN ... Multiple Access Directory Numbers
MAN ... Metropolitan Area Network
MAP ... Maintenance and Administration Position
MAPSS ... Maintenance & Analysis Plan for Special Services
MAR ... Microprogram Address Register
MARC ... Market Analysis of Revenue and Customers system
MAS ... MAin Store
MAS ... Mass Announcement System
MASB ... MAS Bus
MASC ... MAS Controller
MASM ... MAS Memory
MATFAP ... Metropolitan Area Transmission Facility Analysys Program
MBPS ... MegaBits Per Second
MCIAS ... Multi-Channel Intelligent Announcement System
MCC ... Master Control Center
MCCS ... Mechanized Calling Card Service
MCH ... Maintenance CHannel
MCHB ... Maintenance CHannel Buffer
MCI ... Microwave Communications Incorporated
MCIAS ... Multi-Channel Intercept Announcement System
MCN ... Metropolitan Campus Network
MCS ... Meeting Communications Service
MCTRAP ... Mechanized Customer Trouble Report Analysis Plan
MDACS ... Modular Digital Access Control System
MDC ... Marker Distributor Control
MDC ... Meridian Digital Centrex
MDF ... Main Distribution Frame
MDU ... Marker Decoder Unit
MDX ... Modular Digital eXchange
MEC ... Mobile Equipment Console
MELD ... Mechanized Engineering and Layout for Distributing frames
MERS ... Most Economic Route Selection
MET ... Multibutton Electronic Telephone
MF ... Multi Frequency
MFENET ... Magnetic Fusion Energy NETwork
MFJ ... Modification of Final Judgement
MFR ... Multi-Frequency Receivers
MFT ... Metallic Facility Terminal
MG ... MasterGroup
MGT ... MasterGroup Translator
MHS ... Message Handling System
MHZ ... MegaHertZ
MICE ... Modular Integrated Communications Environment
MIN ... Mobile Identification Number
MINX ... Multimedia Information Network eXchange
MIR ... Micro-Instruction Register
MIS ... Management Information System
MISCF ... MISCellaneous Frame
MITS ... Microcomputer Interactive Test System
MLC ... MiniLine Card
MLCD ... Multi-Line Call Detail
MLT ... Mechanized Loop Testing
MMC ... Minicomputer Maintenance Center
MMGT ... MultiMasterGroup Translator
MMOC ... Minicomputer Maintenance Operations Center
MMS ... Main Memory Status
MMS ... Memory Management System
MMX ... Mastergroup MultipleX
MODEM ... MOdulator-DEModulator
MOG ... Minicomputer Operations Group
MOS ... Metal Oxide Semiconductor
MP ... Multi-Processor
MPCH ... Main Parallel CHannel
MPOW ... Multiple Purpose Operator Workstation
MPPD ... Multi-Purpose Peripheral Device
MRF ... Maintenance Reset Function
MS ... Maintenance State
MSC ... Media Stimulated Calling
MTF ... Master Test Frame,
MTP ... Message Transfer Part
MTR ... Mechanized Time Reporting
MTS ... Message Telecommunications Service
MTS ... Message Telephone Service
MTS ... Mobile Telephone Service
MTSO ... Mobile Telephone Switching Office
MTU ... Maintenance Termination Unit
MTU ... Media Tech Unit
MTX ... Mobile Telephone eXchange
MU ... Message Unit
MULDEM ... MULtiplexer-DEMultiplexer
MUX ... MUltipleX
MVP ... Multiline Variety Package
MVS ... Multiple Virtual Storage
MW ... MultiWink
MXU ... MultipleXer Unit
NA ... Next Address
NAC ... Network Administration Center
NAG ... Network Architecture Group
NAM ... Number Assignment Module
NAND ... Not-AND gate
NAS ... Numerical and Atmospheric Sciences network
NCC ... Network Control Center
NCCF ... Network Communications Control Facility
NCP ... Network Control Point
NCS ... National Communications System
NCTE ... Network Channel-Terminating Equipment
NDCC ... Network Data Collection Center
NEBS ... New Equipment-Building System
NESAC ... National Electronic Switching Assistance Center
NEXT ... Near-End X-Talk
NHR ... Non Hierarchial Routing
NI ... Network Interface
NM ... Network Module
NMC ... Network Management Center
NNX ... Network Numbering eXchange
NOC ... Network Operations Center
NOCS ... Network Operations Center System
NORGEN ... Network Operations Report GENerator
NOTIS ... Network Operator Trouble Information System
NPA ... No Power Alarm
NPA ... Numbering Plan Area
NPV ... Net Present Value
NSA ... National Security Agency
NSC ... Network Service Center
NSCS ... Network Service Center System
NSEC ... Network Switching Engineering Center
NSFNET ... National Science Foundation NETwork
NSPMP ... Network Switching Performance Measurement Plan
NT ... Network Termination
NT ... Northern Telecom
NTEC ... Network Technical Equipment Center
NTIA ... National Telecommunications and Information Agency
NTS ... Network Technical Support
NTS ... Network Test System
NUA ... Network User Address
NUI ... Network User Identification
NYNEX ... New York, New England and the unknown (X)
O-LTM ... Optical Line Terminating Multiplexer
OASYS ... Office Automation SYStem
OC ... Operator Centralization
OCC ... Other Common Carrier
OCE ... Other Common carrier channel Equipment
OCU ... Office Channel Unit
ODAC ... Operations Distribution Administration Center
ODD ... Operator Distance Dialing
ODDD ... Operator Direct Distance Dialing
ODS ... Overhead Data Stream
OFNPS ... Outstate Facility Network Planning System
OGT ... OutGoing Trunk
OMM ... Output Message Manual
OMPF ... Operation and Maintenance Processor Frame
ONAC ... Operations Network Administration Center
ONAL ... Off Network Access Line
ONI ... Operator Number Identification
OP ... Outside Plant
OPC ... Originating Point Codes
OPEOS ... Outside Plant planning, Engineering & construction Operations Sys
tem OPM ... Outside Plant Module
OPS ... Off-Premises Station
OPSM ... Outside Plant Subscriber Module
OPX ... Off-Premises eXtension
OR ... Originating Register
ORB ... Office Repeater Bay
ORM ... Optical Remote Module
OS ... Operator Service
OS ... OutState
OSAC ... Operator Services Assistance Center
OSC ... Operator Services Center
OSC ... OSCillator
OSDS ... Operating System for Distributed Switching
OSI ... Open Systems Interconnection
OSO ... Originating Signaling Office
OSP ... OutSide Plant
OSPS ... Operator Service Position System
OSS ... Operator Service System
OUTWATS ... OUTward Wide Area Telecommunications Service
OW ... Over-Write
P/AR ... Peak-to-Average Ratio
PA ... Power Allarm
PA ... Program Address
PABX ... Private Automatic Branch eXchange
PACE ... Program for Arrangement of Cables and Equipment
PACT ... Prefix Access Code Translator
PAD ... Packet Assembly/Disassembly
PAM ... Pulse-Ampitude Modulation
PAN ... Personal Account Number
PANS ... Pretty Advanced New Stuff
PAS ... Public Announcement Service
PAT ... Power Alarm Test
PAX ... Private Automatic eXchange
PBC ... Peripheral Bus Computer
PBC ... Processor Bus Controller
PBD ... Pacific Bell Directory
PBX ... Private Branch eXchange
PC ... Primary Center
PCDA ... Program Controlled Data Acquisition
PCH ... Parallel CHannel
PCM ... Pulse-Code Modulation
PCO ... Peg Count and Overflow
PCTV ... Program Controlled TransVerters
PD ... Peripheral Decoder
PDF ... Power Distribution Frame
PDI ... Power and Data Interface
PDN ... Public Data Network
PDSP ... Peripheral Data Storage Processor
PE ... Peripheral Equipment
PECC ... Product Engineering Control Center
PFPU ... Processor Frame Power Unit
PH ... Parity High bit
PIA ... Plug-In Administrator
PIC ... Plastic-Insulated Cable
PIC ... Primary Independent Carrier
PICS ... Plug-in Inventory Control System (PICS/DCPR)
PIN ... Personal Identification Number
PIP ... Packet Interface Port
PL ... Parity Low bit
PM ... Peripheral Module
PM ... Plant Management
PMAC ... Peripheral Module Access Controller
PMU ... Precision Measurement Unit
PNB ... Pacific Northwest Bell
PNPN ... Positive-Negative-Positive-Negative devices
POB ... Periphal Order Buffer
POF ... Programmable Operator Facility
POP ... Point Of Presence
POTS ... Plain Old Telephone Service
PP ... Post Pay
PPD ... Peripheral Pulse Distributor
PPN ... Public Packet Switching
PPS ... Product Performance Surveys
PPS ... Public Packet Switching network
PRCA ... Puerto Rico Communications Authority
PREMIS ... PREMises Information System
PRI ... Primary Rate Interface
PROM ... Programmable Read-Only Memory
PROMATS ... PROgrammable Magnetic Tape System
PROTEL ... PRocedure Oriented Type Enforcing Language
PRS ... Personal Response System
PRTC ... Puerto Rico Telephone Company
PS ... Program Store
PSAP ... Public Safety Answering Point
PSC ... Prime Service Contractor
PSC ... Public Safety Calling system
PSC ... Public Service Commission
PSDC ... Public Switched Digital Capability
PSE ... Packet Switch Exchange
PSIU ... Packet Switch Interface Unit
PSK ... Phase-Shift Keying
PSM ... Packet Service Module
PSM ... Position Switching Module
PSN ... Packet Switched Network
PSN ... Public Switched Network
PSO ... Pending Service Order
PSS ... Packet Switch Stream
PSS ... Packet Switched Services
PSTN ... Public Switched Telephone Network
PSU ... Program Storage Unit
PSW ... Program Status Word
PT ... Program Timer
PTAT ... Private Trans Atlantic Telecommunications
PTT ... Postal Telephone and Telegraph
PTW ... Primary Translation Word
PUC ... Peripheral Unit Controller
PUC ... Public Utilities Commission
PVC ... Permanent Virtual Circuits
PVN ... Private Virtual Network
QAM ... Quadrature-Amplitude Modulation
QAS ... Quasi-Associated Signaling
QMP ... Quality Measurement Plan
QRSS ... Quasi Random Signal Source
QSS ... Quality Surveillance System
R ... Ring
R&R ... Rate & Route
R&SE ... Research & Systems Engineering
R/O ... Read/Only
R/W ... Read Write
R/WM ... Read/Write Memory
RAM ... Random-Access Memory
RAND ... Rural Area Network Design
RAO ... Regional Accounting Office
RAO ... Revenue Accounting Office
RAR ... Return Address Register
RASC ... Residence Account Service Center
RBHC ... Regional Bell Holding Company
RBOC ... Regional Bell Operating Company
RBOR ... Request Basic Output Report
RC ... Regional Center
RC ... Resistance-Capacitance
RC ... MAC Recent Change Memory Administration Center
RCC ... Radio Common Carrier
RCC ... Remote Cluster Controller
RCC ... Reverse Command Channel
RCF ... Remote Call Forwarding
RCLDN ... Retrieval of Calling Line Directory Number
RCM ... Remote Carrier Module
RCSC ... Remote Spooling Communications Subsystem
RCU ... Radio Channel Unit
RCVR ... ReCeiVeR
RDES ... Remote Data Entry System
RDS ... Radio Digital System
RDT ... Radio Digital Terminal
REC ... Regional Engineering Center
REM ... Remote Equipment Module
REMOBS ... REMote OBservation System
REN ... Ring Equivalence Number
REXX ... REstructred eXtended eXecuter language
RF ... Radio Frequency
RID ... Remote Isolation Device
RISLU ... Remote Integrated Services Line Unit
RLCM ... Remote Line Concentrating Module
RLT ... Remote Line Test
RMAS ... Remote Memory Administration System
RMR ... Remote Message Registers
RMS ... Root-Mean-Square
RN ... Reference Noise
RNOC ... Regional Network Operations Center
RO ... Receive Only
ROB ... Remote Order Buffer
ROC ... Regional Operating Company
ROH ... Receiver Off Hook
ROM ... Read-Only Memory
ROTL ... Remote Office Test Line
RQS ... Rate/Quote System
RQSM ... Regional Quality Service Management
RRO ... Reports Receiving Office
RSA ... Repair Service Attendant
RSB ... Repair Service Bureau
RSC ... Remote Switching Center
RSC ... Residence Service Center
RSCS ... Remote Source Control System
RSCS ... Remote Spooling Communications Subsystem
RSLE ... Remote Subscriber Line Equipment
RSLM ... Remote Subscriber Line Module
RSM ... Remote Switching Module
RSS ... Remote Switching System
RSTS/E ... Resource System Time Sharing/Enhanced
RSU ... Remote Switching Unit
RTA ... Remote Trunking Arrangement
RTL ... Resistor-Transistor Logic
RTM ... Regional Telecommunications Management
RTM ... Remote Test Module
RTS ... Remote Testing System
RTU ... Remote Trunking Unit
RTU ... Right To Use
RUM ... Remote User Multiplex
RWC ... Remote Work Center
RX ... Remote eXchange
S ... Sleeve
SAC ... Service Area Code
SAC ... Service Area Computer
SAC ... Special Area Code
SAG ... Street Address Guide
SAI ... Serving Area Interface
SALI ... Standalone Automatic Location Identification
SAMA ... Step by step Automatic Message Accounting
SAR ... Store Address Register
SARTS ... Switched Access Remote Test System
SAT ... Special Access Termination
SAT ... Supervisory Audio Tone
SBMS ... Southwestern Bell Mobile Service
SBS ... Skyline Business Systems
SC ... Scanner Controller
SC ... Sectional Center
SCAT ... Stromberg-Carlson Assistance Team
SCC ... Specialized Common Carrier
SCC ... Switching Control Center
SCCS ... Specialized Common Carrier Service
SCCS ... Switching Control Center System
SCF ... Selective Call Forwarding
SCM ... Subscriber Carrier Module
SCO ... Serving Central Office
SCOT ... Stepper Central Office Tester
SCOTS ... Surveillance & Control Of Transmissions System
SCP ... Signal Control Point
SCP ... Signal Conversion Point
SCP ... System Control Program
SCPC ... Signal Channel Per Carrier
SCPD ... Supplementary Central Pulse Distributor
SCU ... Selector Control Unit
SCX ... Specialized Communications eXchange
SD&D ... Specific Development & Design
SDIS ... Switched Digital Integrated Service
SDL ... Specification and Description Language
SDLC ... Synchronous Data Link Control
SDN ... Software-Defined Network
SDOC ... Selective Dynamic Overload Controls
SDP ... Service Delivery Point
SDR ... Store Data Register
SDS ... Switched Data Service
SDS ... Synchronous Data Set
SDSC ... Synchronous Data Set Controller
SEAS ... Signaling Engineering and Administration System
SEL ... SELector
SES ... Service Evaluation System
SF ... Single Frequency
SFMC ... Satellite Facility Management Center
SG ... SuperGroup
SGML ... Standard Generic Markup Language
SGMP ... Simple Gateway Management Protocol
SI ... Status Indicator
SIC ... Silicon Integrated Circuit
SID ... System IDentification
SIT ... Special Information Tone
SLC ... Subscriber Loop Carrier
SLE ... Screening Line Editor
SLIC ... Subscriber Line Interface Circuit
SLIM ... Subscriber Line Interface Module
SM ... Switching Module
SMAS ... Supplementary MAin Store
SMAS ... Switched Maintenance Access System
SMASF ... SMAS Frame
SMASPU ... SMAS Power Unit
SMDF ... Subscriber Main Distributing Frame
SMDI ... Subscriber Message Desk Interface
SMDR ... Station Message Detailed Recording
SMG ... SuperMasterGroup
SMS ... Service Management System
SMSA ... Standard Metropolitan Statistical Area
SMTP ... Simple Mail Transfer Protocol
SNA ... System Network Architecture
SNADS ... System Network Architecture Distribution Service
SNET ... Southern New England Telephone
SOAC ... Service Order Analysis Control
SOC ... Service Oversight Center
SOH ... Service Order History
SONAR ... Service Order Negotiation And Retrieval
SONDS ... Small Office Network Data System
SP ... Signal Processor
SP ... Signaling Point
SPAN ... Space Physics Analysis Network
SPAN ... System Performance ANalyzer
SPC ... Southern Pacific Communications
SPC ... Stored Program Control
SPCS ... Stored Program Control Systems
SPI ... Serial Peripheral Interface
SPUC/DL ... Serial Peripheral Unit Controller/Data Link
SQL/DS ... Structured Query Language/Data System
SRA ... Selective Routing Arrangement
SS ... Special Services
SSAS ... Station Signaling and Announcement Subsystem
SSB ... Single-SideBand
SSBAM ... Single-SideBand Amplitude Modulation
SSC ... Special Services Center
SSCP ... Subsystem Services Control Point
SSO ... Satellite Switching Office
SSP ... Signal Switching Point
SSP ... Sponsor Selective Pricing
SSP ... System Status Panel
SSPC ... SSP Controller
SSPRU ... SSP Relay Unit
SSTTSS ... Space-Space-Time-Time-Space-Space network
ST ... STart
STC ... Serving Test Center
STC ... Switching Technical Center
STD ... Subscriber Trunk Dialing
STDM ... Statistical Time Division Multiplexing
STP ... Signal Transfer Point
STS ... Shared Tenant Service
STS ... Space-Time-Space network
SVC ... Switched Virtual Circuits
SVS ... Switched Voice Service
SWB ... SouthWestern Bell
SX ... SimpleX signaling
SXS ... Step by (X) Step
SYC ... SYstem Control
SYSGEN ... SYStem GENeration
T ... Tip
T1/OS ... T1 carrier OutState
T1FE ... T1 carrier Front End
TA ... Terminal Adaptor
TA ... Transfer Allowed
TAC ... Terminal Access Circuit
TAP ... Telephone Assistance Plan
TAS ... Telephone Answering Service
TASC ... Technical Assistance Service Center
TASC ... Telecommunications Alarm Surveillance and Control system
TASI ... Time Assignment Speech Interpolation system
TAT ... TransAtlantic Telephone
TC ... Timing Counter
TC ... Toll Center
TCAP ... Transaction Capabilities Applications Port
TCAS ... T-Carrier Administration System
TCC ... Trunk Class Code
TCG ... Test Call Generation
TCM ... Time Compression Multiplexer
TCM ... Trellis Coded Modulation
TCR ... Transient Call Record
TDAS ... Traffic Data Administration System
TDC ... Tape Data Controller
TDC ... Terrestrial Data Circuit
TDD ... Telecommunications Device for Deaf
TDM ... Time Division Multiplexing
TE ... Terminal Equipment
TE ... Transverse Electric
TEHO ... Tail End Hop Off
TELSAM ... TELephone Service Attitude Measurement
TERM ... TERMinal
TFLAP ... T-carrier Fault-Locating Applications Program
TFS ... Trunk Forecasting System
TGC ... Terminal Group Controller
TGN ... Trunk Group Number
TH ... Trouble History
TIA ... Telephone Information Access
TIRKS ... Trunk Integrated Record Keeping System
TLM ... Trouble Locating Manual
TLN ... Trunk Line Network
TLP ... Transmission Level Point
TLTP ... Trunk Line and Test Panel
TM ... Transverse Magnetic
TMDF ... Trunk Main Distributing Frame
TMMS ... Telephone Message Management System
TMR ... Transient Memory Record
TMRS ... Traffic Measurement and Recording System
TMRS ... Traffic Metering Remote System
TMS ... Time-Multiplexed Switch
TN ... Telephone Number
TN ... Transaction Number
TNDS ... Total Network Data System
TNN ... Trunk Network Number
TNOP ... Total Network Operation Plan
TNPC ... Traffic Network Planning Center
TOPS ... Timesharing OPerating System
TOPS ... Traffic Operator Position System
TP ... Toll Point
TPMP ... Total network data system Performance Measurement Plan
TR ... Test Register
TR ... Transfer Register
TREAT ... Trouble Report Evaluation Analysis Tool
TRMTR ... TRamsMiTteR
TRR ... Tip-Ring Reverse
TSCPF ... Time Switch and Call Processor Frame
TSCPF ... Time Switch and Central Processor Frame
TSI ... Time Slot Interchanger
TSO ... Time Sharing Option
TSORT ... Transmission System Optimum Relief Tool
TSP ... Test SuPervisor
TSP ... Traffic Service Position
TSPS ... Traffic Service Position System
TSS ... Trunk Servicing System
TSST ... Time-Space-Space-Time network
TST ... Time-Space-Time network
TST ... Traveling-Wave Tube
TSTS ... Time-Space-Time-Space network
TT ... Trunk Type
TTC ... Terminating Toll Center
TTL ... Transistor-Transistor Logic
TTP ... Trunk Test Panel
TTS ... Trunk Time Switch
TTTN ... Tandem Tie Trunk Network
TTY ... TeleTYpewriter
TTYC ... TTY Controller
TUR ... Traffic Usage Recording
TUR ... Trunk Utilization Report
TWX ... TeletypeWriter eXchange
UCD ... Uniform Call Distribution
UIC ... User Identification Code
UID ... User ID
UITP ... Universal Information Transport Plan
UNISTAR ... UNIversal Single call Telecommunications Answering & Repair
USB ... Upper Side Band
USITA ... United States Independent Telephone Association
USO ... Universal Service Order
USOC ... Universal Service Order Code
USP ... Universal Sampling Plan
UUCICO ... Unix to Unix Copy Incoming Copy Outgoing
UUCP ... Unix to Unix Copy Program
VAN ... Value Added Network
VC ... Virtual Circuit
VCS ... Virtual Circuit System
VF ... Voice Frequency
VFY ... VeriFY
VGF ... Voice Grade Facility
VHF ... Very High Frequency
VINES ... VIrtual NEtwork Software
VIU ... Voiceband Interface Unit
VLSI ... Very Large-Scale Integrated circuitry
VM/SP ... Virtual Machine/System Product
VMCF ... Virtual Machine Communications Facility
VMR ... Volt-Meter Reverse
VMRS ... Voice Message Relay System
VMS ... Virtual Memory operating System
VMS ... Voice Mail System
VMS ... Voice Management System
VNF ... Virtual Network Feature
VNL ... Via Net Loss plan
VNLF ... Via Net Loss Factor
VODAS ... Voice Over Data Access Station
VPN ... Virtual Private Network
VRS ... Voice Response System
VSAM ... Virtual Storage Access Method
VSAT ... Very Small Aperature Terminal
VSB ... Vestigial SideBand modulation
VSE ... Virtual Storage Extended
VSR ... Voice Storage and Retrieval
VSS ... Voice Storage System
VSSP ... Voice Switch Signaling Point
VTAM ... Virtual Telecommunications Access Method
VTI ... Virtual Terminal Interface
VTOC ... Volume Table Of Contents
VTS ... Video Teleconferencing System
WAN ... Wide Area Network
WATS ... Wide Area Telephone Service
WC ... Wire Center
WCPC ... Wire Center Planning Center
WDT ... Watch Dog Timer
WM ... Work Manager
XB ... X-Bar
XBAR ... X-BAR
XBT ... X-Bar Tandem
XFE ... X-Front End
XMS ... eXtended Multiprocessor operating System
^*^