Federal Standard 1037C

Federal Standard 1037C entitled Telecommunications: Glossary of Telecommunication Terms is a US Federal Standard , issuedby the General ServicesAdministration pursuant to the Federal Property and Administrative Services Act of 1949, as amended.

This document provides Federal departments and agencies a comprehensive source of definitions of terms used in telecommunications and directly related fields by international andU.S. Government telecommunications specialists.

As a publication of the US Government, prepared by an agency of the US Government, it appears to be mostly available as a public domain resource . Note: A few items are derivedfrom copyrighted sources: where this is the case, there is an attribution to the source.

A substantial number of non-trivial 1037C articles are now incorporated into Wikipedia -- please note that only thosearticles

• from 100% public domain sources, and
• with substantial content

are appropriate to be used here.

Note: please do not copy any definitions from Federal Standard 1037C with attribution to Non-Federalsources such as NATO , CCITT , the Radio Regulations etc. as these are derived from sources not known to bein the public domain.

Instead, please write your own definitions for these terms in your own original words.

List of telecommunications terms defined in Federal Standard 1037C

ADP/AIS/MIS

automated information system (AIS) -- automatic datahandling (ADH) -- automatic data processing (ADP) -- automatic dataprocessing equipment (ADPE) -- batch processing -- clearing -- fetch protection -- FIP equipment -- hardware -- information -- information system -- machine-independent -- management information system (MIS) -- man-machine system -- online computersystem -- parallel computing -- penetration -- recovery procedure -- remote access data processing -- remote batch entry -- remote batchprocessing -- remote jobentry (RJE) -- remote operations service element protocol (ROSE) -- security filter -- security kernel -- standby -- system administration -- system analysis -- system documentation -- system integration -- systemintegrity -- systemmanagement -- systems design -- technicalvulnerability -- trusted computing base (TCB) -- trustedcomputer system (TCS) -- user -- validation -- work station

Antennas

Glossary of antenna terms

Codes/Coding

Glossary of coding terms

Computer Graphics

Glossary of computer graphicsterms

Computer Hardware

Glossary of computer hardwareterms

Computer Programming/Languages/Software

Glossary of computerprogramming terms

Control/Control Characters/Command/Error Correction/Handshaking

acknowledge character (ACK) -- ARQ -- backward channel -- backward signal -- backward supervision -- BCH code -- block check -- block parity -- call control character -- call control signal -- cancelcharacter (CAN) -- carrier sense multipleaccess (CSMA) -- channel bits -- character -- character check -- character interval -- checkbit -- check character -- check digit -- checksum -- clearconfirmation signal -- command -- command frame -- command menu -- command protocoldata unit -- common-channel signaling -- connection-in-progress signal -- control character -- controlcommunications -- control operation -- convolutional code -- cyclic redundancy check (CRC) -- data link escapecharacter (DLE) -- data transfer request signal -- DCE clear signal -- DCE waiting signal -- delimiter -- disabling tone -- end-of-mediumcharacter -- end-of-selection character -- end-of-text character (ETX) -- end-of-transmission-block character (ETB) -- end-of-transmission character (EOT) -- enquiry character (ENQ) -- error control -- error-correcting code -- error-correcting system -- error-detecting code -- error-detecting system -- flag -- forward error correction (FEC) -- Hagelbarger code -- Hamming code -- handshaking -- idle character -- longitudinal redundancy check (LRC) -- negative-acknowledge character (NAK) -- nontransparent mode -- overhead information -- password -- pilot -- process computer system -- processcontrol -- process control equipment -- process control system -- ready-for-data signal -- redundancy -- redundancy check -- residual error ratio -- respond opportunity -- response -- Shannon limit -- source quench -- start signal -- substitutecharacter (SUB) -- summation check -- synchronous idlecharacter (SYN) -- transverse parity check -- undetected error ratio -- who-are-you character (WRU)

Distortion/Dispersion/Diffraction

amplitude distortion -- amplitude-vs.-frequency distortion -- bias distortion -- characteristic distortion -- cyclic distortion -- degree of isochronous distortion -- degree of start-stop distortion -- delay distortion -- diffraction -- dispersion -- dispersion-limited operation -- distortion -- distortion-limited operation -- enddistortion -- feederecho noise -- fortuitous distortion -- harmonic distortion -- intermodulation distortion -- intramodal distortion -- isochronousdistortion -- knife-edge effect -- margin -- multimode distortion -- nonlineardistortion -- phase-frequency distortion -- quantizing distortion -- signal droop -- single-harmonicdistortion -- start-stop distortion -- total harmonic distortion (THD)

Encryption/Decryption

Glossary of telecommunications encryption terms

Facsimile

Glossary of fax terms

Fiber Optics

Glossary of fiber optic terms

Filters

Glossary of filter terms

Frequency

aircraft emergency frequency -- automaticfrequency control (AFC) -- band -- bandwidth (BW) -- barrage jamming -- baseband -- calling frequency -- carrierfrequency -- channeloffset -- characteristic frequency -- cutofffrequency -- extremely high frequency (EHF) -- extremely low frequency (ELF) -- frequency -- guarded frequency -- heterodyne -- high frequency -- hiss -- hold-in frequency range -- imagefrequency -- image rejection ratio -- insertion-loss-vs.-frequency characteristic -- intermediate frequency (IF) -- intermodulation product -- lock-in frequency -- lock-in range -- lowest usablehigh frequency (LUF) -- low frequency (LF) -- maximum keyingfrequency -- maximum modulating frequency -- maximum usable frequency (MUF) -- mediumfrequency (MF) -- military common emergency frequency -- natural frequency -- nominal bandwidth -- normalized frequency (V) -- notch -- occupied bandwidth -- precise frequency -- preemphasis -- primary frequency -- primary frequencystandard -- primary service area -- priority -- protected frequency -- pull-in frequency range -- pulse repetition rate -- pump frequency -- quartz oscillator -- radio channel -- radio frequency (rf) -- radio wave -- Rayleigh distribution -- reference frequency -- secondary frequency standard -- sideband -- single-frequency signaling (SF) -- single-toneinterference -- slewing -- spectral density -- spectrum signature -- spread spectrum -- spurious emission -- standard test tone -- standard timeand frequency signal service (STFS) -- stereophonic sound subcarrier -- stopband -- syntonization -- threshold frequency -- transition frequency -- ultrahigh frequency (UHF) -- ultra low frequency (ULF) -- very high frequency (VHF) -- very low frequency (VLF) -- virtual carrierfrequency -- voice frequency (VF) -- wideband

Frequency Allocation/Assignment

allocation (of a frequency band) -- allotment (of a radio frequency or radio frequency channel) -- assigned frequency -- assignedfrequency band -- assignment (of a radio frequency or radio frequencychannel) -- authorized bandwidth -- authorized frequency -- C band -- frequency assignment -- frequency assignment authority

Gain

absolute gain -- antenna gain -- antenna gain-to-noise-temperature (G/T) -- automatic gain control (AGC) -- directive gain -- diversity gain -- equal gain combiner -- fade margin -- gain -- gain medium -- heightgain -- insertion gain -- loop gain -- net gain -- process gain -- signal processinggain -- singing margin -- singing point

Interfacing

cell relay -- data station -- data transmission circuit -- demarcation point (demarc) -- dial mode -- DTE clear signal -- EIA interface -- framed interface -- gateway -- interchangecircuit -- interexchange carrier (IXC) -- interface -- interface functionality -- interfacemessage processor (IMP) -- interface payload -- interface standard -- mediuminterface point (MIP) -- net radio interface (NRI) -- networkinterface -- network interface device (NID) -- network termination 1 (NT1) -- network termination 2 (NT2) -- opticalinterface -- point ofinterface (POI) -- point of presence (POP) -- POSIX -- primary rateinterface (PRI) -- protocol translator -- R interface -- router -- service -- service access point (SAP) -- service data unit (SDU) -- S interface -- terminal adapter -- T-interface -- transparent interface -- T reference point -- U interface -- V reference point

Interference

adjacent-channel interference -- anti-interference -- blanketing -- co-channel interference -- common-mode interference -- common-moderejection ratio (CMRR) -- compatibility -- conducted interference -- differential mode interference -- electromagnetic interference (EMI) -- eyepattern -- far-endcrosstalk -- FM blanketing -- harmful interference -- interactioncrosstalk -- interference -- interference emission -- interference filter -- intersymbol interference -- jamming margin -- jamming to signalratio (J/S) -- limits of interference -- optical interface -- permissible interference -- phase interference fading -- precipitation static (p-static) -- reradiation -- single-frequency interference -- single-toneinterference -- sunspot -- white area

Internet

Archie -- browser -- directed broadcast address -- Domain Name System (DNS) -- Gopher -- ICMP -- The Internet -- Internet Protocol (IP) -- Internet protocol spoofing (IP) -- lynx -- Mosaic -- SLIP -- TCP -- TCP/IP -- TCP/IP Suite -- Terminal AccessController (TAC) -- User Datagram Protocol (UDP) -- web browser -- WorldWide Web (WWW)

Loss/Attenuation

absorption -- absorption band -- absorption coefficient -- absorption index -- absorption loss -- angular misalignment loss -- antenna dissipativeloss -- area loss -- attenuation -- attenuation coefficient -- attenuation constant -- attenuation-limited operation -- attenuator -- bridging loss -- cloud attenuation -- coupling loss -- cutoff attenuator -- differential mode attenuation -- flat fading -- free-space loss -- gap loss -- gap-loss attenuator -- insertion loss -- insertion-loss-vs.-frequency characteristic -- lateral offset loss -- loss -- lossy medium -- macrobend loss -- modal loss -- net loss -- net loss variation -- numericalaperture loss -- path loss -- precipitationattenuation -- preemphasis -- proration -- reflection loss -- return loss -- scattering loss -- selective fading -- shadow loss -- splice loss -- transmission loss -- via net loss (VNL)

Modems

AT Commands -- modem -- modem patch -- narrowband modem -- wideband modem

Modulation

absorptionmodulation -- adaptive differential pulse-code modulation (ADPCM) -- amplitude modulation (AM) -- angle modulation -- bandwidth (BW) -- baseband -- baseband modulation -- binary modulation -- bit-by-bit asynchronous operation -- carrier shift -- center frequency -- chip rate -- chirping -- code-division multiple access (CDMA) -- coherent differentialphase-shift keying (CDPSK) -- conditioned diphase modulation -- continuously variableslope delta modulation (CVSD) -- Costas loop -- cross modulation -- delta modulation (DM) -- delta-sigmamodulation -- demand assignment multiple access (DAMA) -- demodulation -- differential modulation -- differential phase-shift keying (DPSK) -- differential pulse-code modulation (DPCM) -- digitalfrequency modulation -- digital modulation -- digital phase modulation -- direct-sequencemodulation -- disparity -- double modulation -- electro-optic modulator -- exalted-carrierreception -- fixed-reference modulation -- frequency modulation (FM) -- frequency-shift keying (FSK) -- full modulation -- incremental phase modulation (IPM) -- indirect control -- intensity modulation (IM) -- isochronousdemodulation -- isochronous modulation -- keying -- load capacity -- low-level modulation -- maximum modulating frequency -- mechanically induced modulation -- modulation -- multicarrier modulation (MCM) -- overmodulation -- percentage modulation -- phase deviation -- phase modulation (PM) -- phase-shift keying (PSK) -- preemphasis improvement -- preemphasis network -- pseudorandom noise -- pulse-amplitude modulation (PAM) -- pulse-code modulation (PCM) -- pulse-durationmodulation (PDM) -- pulse-frequency modulation (PFM) -- pulse-position modulation (PPM) -- quadrature amplitude modulation (QAM) -- quadrature modulation -- quadrature phase-shift keying (QPSK)-- quantization -- quasi-analogtransmission -- radio -- reduced carrier single-sideband emission -- reducedcarrier transmission -- signal transition -- significant condition -- single-sideband emission (SSB) -- single-sideband equipment reference level (SSB) -- single-sideband suppressed carrier transmission (SSB-SC) -- start-stop margin -- start-stop modulation -- stereophoniccrosstalk -- sub-band adaptive differential pulse code modulation (SB-ADPCM)-- subcarrier -- supergroupdistribution frame (SGDF) -- suppressed carrier transmission -- thin-filmoptical modulator -- unbalanced modulator -- vestigial sideband transmission (VSB) -- white facsimile transmission

Multiplexing

asynchronous time-division multiplexing (ATDM) -- asynchronous transfer mode (ATM) -- carrier system -- cell relay -- channel bank -- common-channel interoffice signaling (CCIS) -- demultiplexing -- D-4 -- digital multiplexer -- digital multiplex hierarchy -- digitalsignal (DS) -- digroup -- drop and insert -- erect position -- fractional T1 -- frame -- framing -- group -- group distributionframe (GDF) -- heterogeneous multiplexing -- homogeneousmultiplexing -- inverse multiplexer -- inverted position -- labeled multiplexing -- master frequency generator -- multicarriermodulation (MCM) -- multichannel -- multiframe -- multiplexaggregate bit rate -- multiplex baseband -- multiplexer/demultiplexer (muldem) -- multiplexer (MUX) -- multiplex hierarchy -- multiplexing (MUXing) -- multiplexlink encryption -- orthogonal multiplex -- precombining -- pregroup combining -- quadruple diversity -- space-division multiplexing -- statisticalmultiplexing -- statistical time-division multiplexing -- supergroupdistribution frame (SGDF) -- synchronous TDM -- synchronous transfer mode -- system loading -- T-carrier -- thin-filmoptical multiplexer -- time-divisionmultiple access (TDMA) -- time-divisionmultiplexing (TDM) -- transmultiplexer -- trunk group multiplexer (TGM) -- two-pilot regulation -- wavelength-division multiplexing (WDM)

Networks and networking

Glossary oftelecommunication network terms

NS/EP

assignment -- communications survivability -- interoperability -- National Communications System (NCS) -- National Coordinating Center for Telecommunications (NCC) -- NS/EP telecommunications -- priority level -- priority level assignment -- private NS/EP telecommunications services -- provisioning -- public switched NS/EP telecommunications services -- serviceidentification -- Telecommunications Service Priority service (TSP) -- Telecommunications Service Priority system (TSP)

Organizations

administration -- AFNOR -- American National StandardsInstitute (ANSI) -- Bell Operating Company (BOC) -- BSI -- Canadian Standards Association (CSA) -- CCIR -- CCITT -- CEN -- CENELEC -- common carrier -- Deutsches Institut für Normung (DIN) -- ETSI -- FCC -- InternationalTelecommunication Union (ITU) -- ISO -- Joint Telecommunications Resources Board (JTRB) -- NationalCommand Authorities (NCA) -- NationalCommunications System (NCS) -- National Coordinating Center for Telecommunications (NCC) -- publicutilities commission (PUC) -- Radio Regulations Board (formerly IFRB) -- recognized operating agency (ROA) -- Regional Bell operating company (RBOC) -- specializedcommon carrier (SCC) -- Verband Deutscher Electrotechniker (VDE)

PCS/UPT/cellular mobile

base station -- call associatedsignaling (CAS) -- call management -- cell -- cellular mobile -- fixed access -- interworkingfunctions -- mobile services switching center (MSC) -- non-callassociated signaling (NCAS) -- non-fixed access -- PCS -- PCS switching center -- PCS System -- personal mobility -- personal registration -- personal terminal -- public land mobile network (PLMN) -- radio interface -- service access -- terminal mobility -- terminalmobility management -- Universal Personal Telecommunications service (UPT) -- UPT access code -- validation -- wireless access mode -- wireless mobility management -- wireless terminal

Power

bel (B) -- carrier power (of a radio transmitter) -- carrier-to-receiver noise density (C /kT ) -- dB -- power -- radiance -- radiant emittance -- radiant intensity -- radiant power -- radiation efficiency -- rated output power -- reflectance -- relative transmission level -- rf powermargin -- sensitivity -- signal level -- signal-to-crosstalk ratio -- SINAD -- singing margin -- single-polarizedantenna -- single-sideband equipment reference level (SSB) -- spectral density -- susceptibilitythreshold -- systemloading

Power (Electrical)

apparent power -- auxiliary power -- demand factor -- demand load -- disconnect switch -- effectivepower -- inverter -- level -- load -- load factor -- nonoperational load -- operational load -- power budget -- power factor -- power failure transfer -- primary distribution system -- primary power -- primary substation -- protector -- station load -- technical load -- uninterruptible power supply -- volt-amperes reactive (vars)

Protocols

acknowledgement -- Advanced DataCommunication Control Procedures (ADCCP) -- binary synchronous communication (bi-sync) -- carrier sense multiple access with collision avoidance (CSMA/CA) -- carrier sense multiple access with collision detection (CSMA/CD) -- Common Management Information Protocol (CMIP) -- connection-oriented data transfer protocol -- disconnect command (DISC) -- facility -- frame relay -- FTP -- GOSIP -- high-level data link control (HDLC) -- HTTP -- ICMP -- Internet Protocol (IP) -- LAP-B -- LAP-D -- link protocol -- mode -- network interface device (NID) -- Network File System (NFS) -- Open SystemsInterconnection Specification (OSI)--Protocol -- ping -- protocol -- protocol-control information -- protocol converter -- protocol data unit (PDU) -- protocol hierarchy -- protocol translator -- remoteoperations service element protocol (ROSE) -- response PDU -- route -- segment -- serial -- Simple Mail Transfer Protocol (SMTP) -- Simple Network Management Protocol (SNMP) -- SLIP -- slot -- slot time -- synchronous data link control (SDLC) -- TCP -- TCP/IP -- TCP/IP Suite -- Telnet -- transmission controlprotocol -- User Datagram Protocol (UDP) -- zero-bit insertion

Radio

adaptive radio -- airborne radio relay -- air-ground radiotelephone service -- allcall -- amateur service -- anycall -- atmospheric noise -- automated radio -- automatic link establishment (ALE) -- automatic message exchange (AME) -- automatic sounding -- brick -- broadcasting-satellite service -- broadcasting satellite space station -- broadcasting service -- broadcasting station -- broadcast operation -- capture effect -- carriersynchronization -- cellular mobile -- clear channel -- closedcircuit -- combat-net radio (CNR) -- connectivity exchange (CONEX) -- controller -- cross-band radiotelegraph procedure -- coverage -- dead space -- deemphasis -- detector -- deviation ratio -- diffraction region -- digitalselective calling (DSC) -- directed net -- direction finding -- discriminator -- distance measuring equipment (DME) -- diversity reception -- diversity transmission -- duplex operation -- emergency locator transmitter (ELT) -- emergency position-indicating radiobeacon station -- emphasis -- feeder link -- FM blanketing -- FM improvement factor -- FM improvement threshold -- Fresnelzone -- harmfulinterference -- heterodyne repeater -- homing -- horn -- indefinite callsign -- inside plant -- k-factor -- link -- linking protection (LP) -- link quality analysis (LQA) -- maximum usable frequency (MUF) -- meaconing -- mean power of a radio transmitter -- medium -- message heading -- message part -- meteor burstcommunications -- multi-satellite link -- narrowband radio voice frequency (NBRVF) -- near-vertical-incidence skywave -- net control station (NCS)-- net operation -- net radio interface (NRI)-- off-the-air -- off-the-airmonitoring -- on-the-air -- path -- PBER -- PCS -- peak envelope power (PEP, pX, PX of a radio transmitter) -- pilot -- precipitation static (p-static) -- preemphasis -- preemphasis improvement -- preemphasis network -- preliminary call -- primaryservice area -- propagation mode -- propagation path obstruction -- protection interval (PI) -- push-to-talk operation -- quadruple diversity -- query call -- radiation -- radio -- radio and wireintegration (RWI) -- radio channel -- radio common carrier (RCC) -- radiocommunication -- random access discrete address (RADA) -- reflecting layer -- rural radio service -- rural subscriberstation -- scan-stoplockup -- ship Earthstation -- shortwave -- smooth Earth -- sounding -- sporadic E propagation -- spurious response -- stereophonic sound subcarrier -- stressed environment -- sudden ionospheric disturbance (SID) -- sunspot -- surface wave -- tail circuit -- terrestrial radiocommunication -- terrestrial station -- transmitter power output rating -- traveling wave -- TRI-TAC equipment -- vestigial sideband transmission (VSB) -- white area -- wildcard character

Routing

adaptive routing -- alternate routing -- avoidance routing -- call tracing -- circuit routing -- circuit switchingunit (CSU) -- collective routing -- destination routing -- deterministic routing -- dynamicallyadaptive routing -- flood search routing -- free routing -- heuristic routing -- hierarchical routing -- hybrid routing -- mediation function -- multicast address -- networkadministration -- primaryroute -- rerouting -- route -- route diversity -- route matrix -- routing -- sender -- spill-forward feature -- spur

Satellites

acquisition -- active satellite -- aeronautical mobile-satellite service -- aeronautical mobile-satellite off-route service (OR) -- aeronautical mobile-satellite route service (R) -- amateur-satelliteservice -- apogee -- broadcasting-satellite service -- broadcasting satellite space station -- carrier-to-receiver noise density (C /kT) -- C-Band -- chip -- coast Earth station -- communications satellite -- community reception in thebroadcasting-satellite service -- coordination area -- cross-site link -- direct orbit -- downlink (D/L) -- dual access -- Earth coverage -- Earth exploration-satellite service -- Earth station -- Earth terminal -- Earth terminalcomplex -- equatorialorbit -- equivalent satellite link noise temperature -- fixed-satelliteservice -- footprint -- geostationary orbit -- geosynchronousorbit -- handoff -- inclination of anorbit (of an Earth satellite) -- inclined orbit -- individual reception in the broadcasting-satellite service -- inter-satelliteservice -- land mobile-satellite service -- maritime mobile-satellite service -- meteorological-satellite service -- mobile Earth station -- multiple access -- multi-satellite link -- orbit -- orbit determination -- passive satellite -- periapsis -- perigee -- period of a satellite -- polar orbit -- preassignment access plan -- pulse-address multiple access (PAMA) -- radiodetermination-satellite service -- radionavigation-satellite service -- resource controller (RC) -- retrograde orbit -- satellite -- ship Earth station -- space subsystem -- spacecraft -- space operationservice -- space radiocommunication -- space research service -- space system -- space telecommand -- space tracking -- spot beam -- standard frequency and time signal-satellite service -- synchronous orbit -- synchronous satellite -- tail circuit -- uplink (U/L) -- view

Security

access -- anti-jam -- anti-spoof -- authenticate -- authentication -- authenticator -- automated information systemssecurity -- between-the-lines entry -- BLACK -- BLACK signal -- browsing -- bug -- certification -- clipperchip -- code -- communications deception -- communications-electronics (C-E) -- communicationsintelligence (COMINT) -- communicationsprotection -- communications security (COMSEC) -- compromise -- computer security (COMPUSEC) -- COMSECequipment -- configuration management -- controlled area -- controlled security operation -- controlled space -- data security -- electronicemission security -- emanations security (EMSEC) -- emissionsecurity -- end-to-end security -- environmental security -- information security -- information systems security (INFOSEC) -- label -- limited protection --monitoring -- NAK attack -- operations security -- password -- penetration -- privacy -- scrambler -- secure communications -- securetransmission -- security -- security filter -- security kernel -- security management -- self-authentication -- sensitive information -- server -- signals security -- transmissionsecurity key (TSK) -- trusted computing base (TCB)-- trustedcomputer system (TCS) -- Warner exemption

Services and Service Features

Glossary oftelecommunication service terms

Standards

ANSI/EIA/TIA-568 -- ASCII -- basic mode link control -- basic rate interface (BRI) -- de factostandard -- frequency standard -- functional profile -- GOSIP -- group -- industry standard -- interface standard -- International Telegraph Alphabet Number 5 (ITA-5) -- interoperabilitystandard -- message handling system (MHS) -- National Electric Code ® (NEC) -- network terminalnumber (NTN) -- NTSC standard -- Open Systems Interconnection (OSI) -- Open Systems Interconnection (OSI)--architecture -- Open SystemsInterconnection Specification (OSI)--Protocol -- Open Systems Interconnection--Reference Model (OSI--RM) -- Open Systems Interconnection Definitions (OSI)--Service -- Open Systems Interconnection Management (OSI)--Systems -- POSIX -- precise frequency -- primary frequency standard -- proprietary standard -- p × 64 -- quarter common intermediate format (QCIF) -- R interface -- rubidium clock -- rubidium standard -- secondary frequency standard -- secondary timestandard -- serial -- Signaling System No. 7 ( SS7 ) -- SONET -- standard -- standard opticalsource -- standard time and frequency signal service (STFS) -- system standard -- terminal adapter -- time standard -- V-series Recommendations -- X.-seriesRecommendations

Storage

accumulator -- archiving -- arithmeticoverflow -- arithmetic register -- arithmetic underflow -- associative storage -- auxiliarystorage -- buffer -- cachememory -- CD ROM -- channel -- clear -- computer programorigin -- direct access -- direct address -- diskette -- disk pack -- elastic buffer -- erase -- field -- file -- file transfer, access, and management (FTAM) -- hard sectoring -- head -- interblock gap -- internal memory -- loader -- machine-readablemedium -- magnetic card -- magnetic corestorage -- magnetic drum -- magnetic tape -- main storage -- medium -- memory -- off-line storage -- optical disk -- overlay -- overload -- packing density -- permanent storage -- phase-encodedrecording (PE) -- phase flux reversal -- print-through -- programmable read-only memory (PROM) -- queue -- queue traffic -- queuing -- random access memory (RAM) -- read head -- reading -- read-only memory (ROM) -- read-onlystorage -- record -- record communication -- record information -- record medium -- regeneration -- register -- rotationalposition sensing -- sector -- sectoring -- seek -- seektime -- shift register -- simple buffering -- skew -- soft sectoring -- spooling -- storage -- storagecell -- store-and-forward (S-F) -- store-and-forward switching center -- streaming tapedrive -- streaming tape recording -- tag image file format (TIFF) -- tape relay -- track -- track density -- tracking error -- variable lengthbuffer -- virtual memory -- virtual storage -- volatile storage -- volume -- work space -- write

Synchronization

bilateral synchronization -- carriersynchronization -- digital synchronization -- double-ended synchronization -- frame synchronization -- linear analog synchronization -- lip synchronization -- mutually synchronized network -- mutualsynchronization -- nonsynchronous data transmission channel -- pilot -- single-endedsynchronization -- synchronism -- synchronization -- synchronization bit -- synchronization code -- synchronization pulse -- synchronous -- timing tracking accuracy -- unilateral synchronization system

Telegraphy

A-condition -- Baudot code -- cable -- chad tape -- characteristicdistortion -- character-stepped -- double-frequency shift keying (DFSK) -- end distortion -- equal-length code -- frequency-shift telegraphy -- internal bias -- local battery -- mark -- narrative traffic -- neutral direct-current telegraph system -- neutral operation -- polar direct-current telegraph transmission -- polarential telegraph system -- polar operation -- push-to-type operation -- radiotelegram -- radio telegraphy -- record communication -- reperforator -- sending-end crossfire -- space -- tape relay -- telegram -- telegraphy -- teleprinter -- teletypewriter (TTY) -- terminal equipment -- tone diversity -- TTY/TDD -- twinplex -- two-tone keying -- voice-frequencytelegraph (VFTG) -- word

Telephony

Glossary of telephony terms

Television

advancedtelevision (ATV) -- aspect ratio -- cable TV (CATV) -- cable television relay service station (CARS) -- chroma keying -- chrominance signal -- closed captioning -- closed circuit -- composite video -- distribution-quality television -- extended-definition television (EDTV) -- fixed microwave auxiliary station -- freeze frame television -- full-motion operation -- ghost -- head end -- high-definition television (HDTV) -- improved-definition television (IDTV) -- lip synchronization -- minimum picture interval -- PAL -- PAL-M -- picture black -- picture white -- raster -- reference black level -- reference whitelevel -- RGB -- scanning -- SECAM -- studio-to-transmitter link (STL) -- television (TV) -- video

Time/Timing

absolute delay -- cesium clock -- channel time slot -- clock -- coasting mode -- coherence time -- coordinated clock -- coordinated timescale -- Coordinated Universal Time (UTC)-- data transfer time -- date -- date-time group (DTG) -- dating format -- DoD master clock -- epoch date -- equipment clock -- external timing reference -- falseclock -- Greenwich Mean Time (GMT) -- heterochronous -- hierarchically synchronized network -- homochronous -- independent clocks -- indirect control -- International Atomic Time (TAI) -- isochronous -- isochronous demodulation -- isochronousmodulation -- isochronous signal -- Julian date -- leap second -- local clock -- master clock -- master-slave timing -- mesochronous -- mutuallysynchronized network -- mutual synchronization -- near real time -- nodal clock -- nonsynchronousnetwork -- oligarchically synchronized network -- plesiochronous -- precise time -- precise time and time interval (PTTI) -- primary time standard -- principal clock -- protectioninterval (PI) -- pull-in frequency range -- quartz clock -- real time -- referenceclock -- release time -- remote clock -- rise time -- rubidium clock -- rubidium standard -- secondary timestandard -- serial -- slaveclock -- standard frequency and time signal-satellite service -- standard frequency and time signal service -- standard frequency and time signal station -- standard time and frequencysignal service (STFS) -- station clock -- synchronism -- synchronization -- synchronous network -- synchronous TDM -- time -- time ambiguity -- time instability -- time interval error (TIE)-- time jitter -- time marker -- time of occurrence -- time-out -- time scale -- time standard -- timing recovery -- timing signal -- timing trackingaccuracy -- transmit-after-receive time delay -- transmitter attack-time delay -- transmitter release-time delay -- uniform time scale -- unit interval -- Universal Time (UT) -- UTC(i )

Traffic

activity factor -- adaptive channel allocation -- busy hour -- busy season -- calling rate -- call-second -- connections per circuit hour (CCH) -- directionalization -- FOT -- frequency prediction -- grade of service (GOS) -- group busy hour (GBH) -- high-usage trunk group -- holding time -- interconnectfacility -- line traffic coordinator (LTC) -- loading -- minimize -- narrative traffic -- net control station (NCS) -- off-line recovery -- overflow -- queue -- queue traffic -- queuing -- recordtraffic -- scanning -- short haul tolltraffic -- switch busyhour -- traffic

Transmission and Transmission lines

Glossary of telecommunications transmission terms

Video

average picturelevel (APL) -- blockdistortion -- blurring -- color errors -- continuous presence -- contrast -- control field -- edge busyness -- error blocks -- field -- frame -- freezeframe -- image -- interlaced scanning -- jerkiness -- mosquito noise -- motion compensation -- motion responsedegradation -- motion video -- object -- object persistence -- object retention -- panning -- p × 64 -- quarter common intermediate format (QCIF) -- scene cut -- scene cut response -- smearing -- snow -- spatial application -- spatial edge noise -- still image -- still video -- temporal application -- temporal edge noise -- transmission service channel -- video -- videophone -- windowing

Waves

carrier (cxr) -- coherence area -- coherencelength -- coherent -- continuous wave (cw) -- depolarization -- doppler effect -- electromagnetic wave (EMW) -- elliptical polarization -- envelope -- group delay -- group delaytime -- guided wave -- indirect wave -- left-hand polarizedwave (anti-clockwise) -- linear polarization -- material scattering -- microwave -- millimeter wave -- plane wave -- polarization -- polarizationdiversity -- Poynting vector -- propagation -- pulse carrier -- radiant energy -- radiation -- radio -- radio beam -- radiocommunication -- radio wave -- reflection loss -- reflection -- reflection coefficient (RC) -- right-handpolarized wave (clockwise) -- scattering -- signature -- spurious response -- square wave -- standing wave -- standing wave ratio (SWR) -- troposphericwave -- waveform -- wavefront -- waveguide scattering -- wave impedance -- wavelength -- wavelength stability -- wave trap

Other

attack time -- vox

Orphans

Access charge -- AeronauticalEmergency Communications System Plan -- Adaptivecommunications -- Adder-subtracter -- Address message -- AIODleads -- Air-ground worldwide communications system -- Alarm sensor -- Alternate party -- Area broadcast shift -- Arithmetic shift -- Articulation score -- Asynchronous communicationssystem -- Audible ringing tone -- Audio response unit -- Automatic call distributor -- Automatic callback -- Automatic switching system -- Back-to-back connection -- Balancereturn loss -- Bandwidth compression -- Bit-count integrity -- Bit-sequence independence -- Bitinversion -- Bit slip -- Bit synchronous operation -- Black noise -- Blind transmission -- Block check character -- Bridge-to-bridge station -- Call-sign allocation plan -- Callcollision -- Call delay -- Call duration -- Call processing -- Call set-up time -- Camp-on busy signal -- Carsonbandwidth rule -- Centrex service -- Cesium standard -- Channel reliability -- Character-count integrity -- Circuit reliability -- Circuitrestoration -- Circular polarization -- Circulator -- Clear message -- Closed-loop transfer function -- Closed waveguide -- Codedset -- Command and control warfare -- Commonality -- Communications blackout -- Communications jamming -- Communications subsystem -- Communications system engineering -- Companding -- Compatible sideband transmission -- Computer conferencing -- Computer network operating system -- Conduction band -- Conferenceoperation -- Configuration control -- Conservation of radiance -- Control of electromagneticradiation -- Convoy internalcommunications -- Cryptochannel -- Curve-fitting compaction -- DOD master clock -- Data access arrangement -- Data bank -- Data element -- Dataforwarder -- Data service unit -- Decollimation -- Dejitterizer -- Demand assignment -- Desensitation -- Designobjective -- Dielectric strength -- Digital milliwatt -- Disengagement originator -- Distributed-queue dual-bus network -- Disturbance voltage -- Dropout -- Dual in-line package -- Duplexer -- Effective datatransfer rate -- Effective transmissionrate -- Efficiency factor -- Electro-optic effect -- Electro-optics -- Electromagnetic interference control -- Electromagnetic radiation hazards -- Electromagnetic survivability -- Electronic deception -- Electronic warfare support measures -- Endurability -- Exempted addressee -- Extendedsuperframe -- Extinction ratio -- FCC registration program -- Facsimile converter -- Fading distribution -- Fall time -- Flywheel effect -- Foreign instrumentationsignals intelligence -- Forward echo -- Four-wire circuit -- Four-wire terminating set -- Frame slip -- Framing bit -- Frequency-exchange signaling -- Frequency averaging -- Frequency compatibility -- Frequencyfrogging -- Frequency sharing -- Frequency shift -- Gaussian beam -- Ground constants -- Ground loop -- High-performance equipment -- Hop count -- Hybrid balance -- Identification, friend or foe -- Injection laser diode -- Interchangeability -- Inverse-squarelaw -- Ionospheric sounding -- Justify -- Kerr electro-opticeffect -- Key pulsing -- Lambert's cosine law -- Loadingcharacteristic -- Loading coil -- Local call -- Lockout(telecommunication) -- Long-haul communications -- Long-term stability -- Longitudinal voltage -- Low-performance equipment -- Low-power communication device -- Magneto-optic effect -- Maintainability -- Maximal-ratio combiner -- Maximum user signaling rate -- Mean time between outages -- Medium-power talker -- Message format -- Modulation factor -- Multiport repeater -- Nuclear hardness -- Nyquist rate -- Operating time-- Operational service period -- Optical attenuator -- Optical density -- Optical switch -- Out-of-bandsignaling -- Output rating -- Packet-switching node -- Par meter -- Password length equation -- Password length parameter -- Path quality analysis -- Phantom circuit -- Phase inversion -- Photocurrent -- Planck's law -- Proceed-to-select -- Psophometric voltage -- Pulsating direct current -- Pulselink repeater -- Quasi-analog signal -- Radio equipment -- Radio fix -- Radiometry -- Randomizer -- Receive-after-transmit timedelay -- Receiver attack-time delay -- Recorder warning tone -- Reference circuit -- Reflectivity -- Reframing time -- Repeating coil -- Ringaround -- Ringback signal -- Ringdown -- Ringer equivalencynumber -- Round-trip delay time -- Schematic -- Second dialtone -- Separate channel signaling -- Serial access -- Simplexcircuit -- Simplex signaling -- Slant range -- Slave station -- Specific detectivity -- Speckle pattern -- Speed of service -- Standard telegraph level -- Standard test signal -- Steady-state condition -- Tactical communications system -- Teletraining -- Ternary signal -- Thermodynamic temperature -- Third-order intercept point -- Time-assignment speechinterpolation -- Tactical datainformation link--A -- Time-domainreflectometer -- Time code ambiguity -- Toll switching trunk -- Traffic-flow security -- Transmission coefficient -- Transmit flow control -- Turnkey -- UPT environment -- UPT service profile -- Userinformation bit -- Video teleconferencingunit -- Virtual call capability

External link

• http://www.its.bldrdoc.gov/fs-1037/fs-1037c.htm