Federal Standard 1037C
Federal Standard 1037C entitled Telecommunications: Glossary of Telecommunication Terms is a US Federal Standard, issued by the General Services Administration 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 and U.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 derived from copyrighted sources: where this is the case, there is an attribution to the source.
Note: please do not copy any definitions from Federal Standard 1037C with attribution to Non-Federal sources such as NATO, CCITT, the Radio Regulations etc. as these are derived from sources not known to be in the public domain.
List of telecommunications terms defined in Federal Standard 1037C
ADP/AIS/MIS
automated information system (AIS) -- automatic data handling (ADH) -- automatic data processing (ADP) -- automatic data processing equipment (ADPE) -- batch processing -- clearing -- fetch protection -- FIP equipment -- hardware -- information -- information system -- machine-independent -- management information system (MIS) -- man-machine system -- online computer system -- parallel processing -- penetration -- recovery procedure -- remote access data processing -- remote batch entry -- remote batch processing -- remote job entry (RJE) -- remote operations service element protocol (ROSE) -- security filter -- security kernel -- standby -- system administration -- system analysis -- system documentation -- system integration -- system integrity -- system management -- systems design -- technical vulnerability -- trusted computing base (TCB) -- trusted computer system (TCS) -- user -- validation -- work station
Antennas: Glossary of antenna terms
Codes/Coding: Glossary of coding terms
Computer Graphics: Glossary of computer graphics terms
Computer Hardware: Glossary of computer hardware terms
Computer Programming/Languages/Software: Glossary of computer programming 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 -- cancel character (CAN) -- carrier sense multiple access (CSMA) -- channel bits -- character -- character check -- character interval -- check bit -- check character -- check digit -- checksum -- clear confirmation signal -- command -- command frame -- command menu -- command protocol data unit -- common-channel signaling -- connection-in-progress signal -- control character -- control communications -- control operation -- convolutional code -- cyclic redundancy check (CRC) -- data link escape character (DLE) -- data transfer request signal -- DCE clear signal -- DCE waiting signal -- delimiter -- disabling tone -- end-of-medium character -- 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 -- process control -- process control equipment -- process control system -- ready-for-data signal -- redundancy -- redundancy check -- residual error ratio -- respond opportunity -- response -- Shannon's law -- source quench -- start signal -- substitute character (SUB) -- summation check -- synchronous idle character (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 -- end distortion -- feeder echo noise -- fortuitous distortion -- harmonic distortion -- intermodulation distortion -- intramodal distortion -- isochronous distortion -- knife-edge effect -- margin -- multimode distortion -- nonlinear distortion -- phase-frequency distortion -- quantizing distortion -- signal droop -- single-harmonic distortion -- start-stop distortion -- total harmonic distortion (THD)
Encryption/Decryption
bulk encryption -- cipher -- cipher system -- cipher text -- ciphony -- civision -- codress message -- compromise -- COMSEC equipment -- cover -- cryptanalysis -- CRYPTO -- Data Encryption Standard (DES) -- decipher -- decode -- decrypt -- descrambler -- encipher -- encode -- encoding law -- encrypt -- end-to-end encryption -- garble -- group -- key -- key distribution center (KDC) -- key management -- key stream -- link encryption -- multiplex link encryption -- net control station (NCS) -- null -- OTAR -- plain text -- protected distribution system (PDS) -- protection interval (PI) -- pseudorandom number generator -- public key cryptography -- RED/BLACK concept -- RED signal -- rekeying -- remote rekeying -- security management -- spoofing -- superencryption -- synchronous crypto-operation -- transmission security key (TSK) -- trunk encryption device (TED) -- type 1 product -- type 2 product -- type 3 algorithm -- type 4 algorithm -- unique key -- variant -- vocoder
Facsimile
analog facsimile equipment -- aperture distortion -- aspect ratio -- black facsimile transmission -- black recording -- black signal -- center frequency -- confirmation to receive -- continuous tone copy -- contouring -- cooperation factor -- density -- diametral index of cooperation -- digital facsimile equipment -- direction of scanning -- direct recording -- drum factor -- drum speed -- electrochemical recording -- electrolytic recording -- electronic line scanning -- elemental area -- facsimile (FAX) -- flood projection -- frame -- graphics -- halftone characteristic -- hard copy -- horizontal resolution -- index of cooperation -- Kendall effect -- landscape mode -- line-to-line correlation -- maximum keying frequency -- maximum modulating frequency -- multipath -- multiple-spot scanning -- noisy black -- noisy white -- nominal linewidth -- object -- pel -- phasing -- photosensitive recording -- picture black -- picture frequency -- picture white -- portrait mode -- record communication -- recording spot -- record medium -- reproduction speed -- run-length encoding -- scanning -- scanning direction -- scanning line -- signal contrast -- simple scanning -- skew -- solid-state scanning -- spot projection -- spot size -- spot speed -- stagger -- start-record signal -- stop-record signal -- stroke speed -- synchronizing -- synchronizing pilot -- tailing -- total line length -- transmission time -- transverse redundancy check (TRC) -- underlap -- white facsimile transmission -- white signal -- X-dimension of recorded spot -- X-dimension of scanning spot -- Y-dimension of recorded spot -- Y-dimension of scanning spot
Fiber Optics
abrasive -- acceptance angle -- acceptance cone -- aligned bundle -- all-silica fiber -- angle of deviation -- angle of incidence -- aramid yarn -- armor -- axial propagation constant -- [[bandwidth•distance product]] -- bound mode -- braid -- break out -- breakout cable -- buffer -- bundle -- cable -- cable cutoff wavelength (cc) -- cladding -- cladding diameter -- cladding mode -- cladding mode stripper -- cleave -- concentricity error -- core -- core area -- core diameter -- coupled modes -- coupling efficiency -- critical angle -- cutback technique -- cutoff mode -- cutoff wavelength -- deeply depressed cladding fiber -- dielectric waveguide -- differential quantum efficiency -- dispersion -- dispersion-shifted fiber -- dispersion-unshifted fiber -- dopant -- doubly clad fiber -- duplex cable -- effective mode volume -- electrical length -- end finish -- equilibrium length -- equilibrium mode distribution (EMD) -- equilibrium mode simulator -- evanescent field -- evanescent mode -- extrinsic joint loss -- fiber amplifier -- fiber optic cable -- fiber optic link -- fiber optics (FO) -- first window -- flooding compound -- fundamental mode -- fusion splice -- gap loss -- gap-loss attenuator -- gel -- glass -- graded-index fiber -- graded-index profile -- group delay -- group index -- group velocity -- guided ray -- hockey puck -- homogeneous cladding -- hybrid cable -- hybrid mode -- hydroxyl ion absorption -- inclusion -- index dip -- index-matching material -- insertion loss -- intensity modulation (IM) -- intramodal distortion -- intrinsic joint loss -- joint -- lateral offset loss -- launch angle -- launching fiber -- launch numerical aperture (LNA) -- lay length -- leaky mode -- leaky ray -- long wavelength -- macrobend -- macrobend loss -- mandrel wrapping -- material dispersion coefficient [M()] -- material scattering -- mechanical splice -- meridional ray -- microbend -- minimum bend radius -- minimum-dispersion window -- minimum-loss window -- modal distribution -- modal loss -- modal noise -- mode -- mode coupling -- mode field diameter (MFD) -- mode partition noise -- mode scrambler -- mode volume -- multifiber cable -- multifiber joint -- multimode distortion -- multimode optical fiber -- near-field region -- near-field scanning -- nonlinear scattering -- numerical aperture loss -- numerical aperture (NA ) -- OFC -- OFN -- OFNP -- OFNR -- open waveguide -- optical connector -- optical fiber -- optical isolator -- optical junction -- ovality -- overfill -- parabolic profile -- phase term -- pigtail -- plastic-clad silica fiber (PCS) -- polarization-maintaining optical fiber (PM) -- power-law index profile -- precision-sleeve splicing -- primary coating -- profile parameter (g ) -- quadruply clad fiber -- radiation angle -- radiation-hardened fiber -- radiation mode -- radiation pattern -- reference surface -- reflection loss -- refracted ray -- refractive index contrast -- refractive index (n, ) -- refractive index profile -- ribbon cable -- rip cord -- scattering center -- second window -- short wavelength -- silica -- single-mode optical fiber -- skew ray -- slab-dielectric waveguide -- soliton -- SONET -- spectral loss curve -- splice loss -- splice organizer -- star coupler -- step-index fiber -- step-index profile -- strength member -- substitution method -- surface wave -- tap -- tapered fiber -- T-coupler -- terminus -- thin-film optical waveguide -- third window -- tolerance field -- transmitter central wavelength range (max- min) -- transverse electric and magnetic mode (TEM) -- transverse electric mode (TE) -- transverse magnetic mode (TM) -- traveling wave -- vertex angle -- waveguide -- weakly guiding fiber -- window -- zero-dispersion slope -- zero-dispersion wavelength -- zip-cord
Filters
bandpass filter -- bandpass limiter -- band-stop filter -- character filter -- dichroic filter -- digital filter -- filter -- high-pass filter -- interference filter -- Kalman filter -- loop filter -- low-pass filter -- mode filter -- optical filter -- roofing filter -- security filter
Frequency
aircraft emergency frequency -- automatic frequency control (AFC) -- band -- bandwidth (BW) -- barrage jamming -- baseband -- calling frequency -- carrier frequency -- channel offset -- characteristic frequency -- cutoff frequency -- extremely high frequency (EHF) -- extremely low frequency (ELF) -- frequency -- guarded frequency -- heterodyne -- high frequency -- hiss -- hold-in frequency range -- image frequency -- image rejection ratio -- insertion-loss-vs.-frequency characteristic -- intermediate frequency (IF) -- intermodulation product -- lock-in frequency -- lock-in range -- lowest usable high frequency (LUF) -- low frequency (LF) -- maximum keying frequency -- maximum modulating frequency -- maximum usable frequency (MUF) -- medium frequency (MF) -- military common emergency frequency -- natural frequency -- nominal bandwidth -- normalized frequency (V) -- notch -- occupied bandwidth -- precise frequency -- preemphasis -- primary frequency -- primary frequency standard -- 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-tone interference -- slewing -- spectral density -- spectrum signature -- spread spectrum -- spurious emission -- standard test tone -- standard time and frequency signal service (STFS) -- stereophonic sound subcarrier -- stopband -- syntonization -- threshold frequency -- transition frequency -- ultra high frequency (UHF) -- ultra low frequency (ULF) -- very high frequency (VHF) -- very low frequency (VLF) -- virtual carrier frequency -- voice frequency (VF) -- wideband
Frequency Allocation/Assignment
allocation (of a frequency band) -- allotment (of a radio frequency or radio frequency channel) -- assigned frequency -- assigned frequency band -- assignment (of a radio frequency or radio frequency channel) -- 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 -- height gain -- insertion gain -- loop gain -- net gain -- process gain -- signal processing gain -- 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 -- interchange circuit -- interexchange carrier (IXC) -- interface -- interface functionality -- interface message processor (IMP) -- interface payload -- interface standard -- medium interface point (MIP) -- net radio interface (NRI) -- network interface -- network interface device (NID) -- network termination 1 (NT1) -- network termination 2 (NT2) -- optical interface -- point of interface (POI) -- point of presence (POP) -- POSIX -- primary rate interface (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-mode rejection ratio (CMRR) -- compatibility -- conducted interference -- differential mode interference -- electromagnetic interference (EMI) -- eye pattern -- far-end crosstalk -- FM blanketing -- harmful interference -- interaction crosstalk -- interference -- interference emission -- interference filter -- intersymbol interference -- jamming margin -- jamming to signal ratio (J/S) -- limits of interference -- optical interface -- permissible interference -- phase interference fading -- precipitation static (p-static) -- reradiation -- single-frequency interference -- single-tone interference -- 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 Access Controller (TAC) -- User Datagram Protocol (UDP) -- web browser -- World Wide Web (WWW)
ISDN
access contention -- B channel -- bearer service -- broadband ISDN (B-ISDN) -- circuit transfer mode -- contribution -- customer access -- D channel -- demand service -- digital subscriber line (DSL) -- distribution -- distribution service -- event -- frame -- functional signaling -- H-channel -- hybrid interface structure -- interactive service -- interface functionality -- interface payload -- ISDN -- labeled channel -- labeled interface structure -- labeled multiplexing -- labeled statistical channel -- LAP-D -- messaging service -- network element (NE) -- network termination -- network termination 1 (NT1) -- network termination 2 (NT2) -- positioned channel -- post-production processing -- primary rate interface (PRI) -- reference configuration -- reference point -- reserved circuit service -- retrieval service -- R interface -- Signaling System No. 7 (SS7) -- S interface -- synchronous transfer mode -- teleaction service -- terminal adapter -- T-interface -- transfer mode -- transit delay -- T reference point -- U interface -- V reference point -- wide area network (WAN)
LANs/MANs/WANs
baseband local area network -- bridge -- brouter -- carrier sense -- domain name server -- Ethernet -- fiber distributed data interface (FDDI) -- head end -- jabber -- LAN application (software) -- lobe attaching unit -- local area network (LAN) -- logical link control sublayer (LLC) -- metropolitan area network (MAN) -- network control program (NCP) -- network interface device (NID) -- network topology -- physical signaling sublayer (PLS) -- ring latency -- ring network -- server -- S interface -- slotted-ring network -- switched multimegabit data services (SMDS) -- tail circuit -- token -- token-bus network -- token passing -- token ring adapter -- truncated binary exponential backoff -- wide area network (WAN)
Layered Systems/Open Architecture
abstract syntax -- encapsulation -- expedited data unit -- GOSIP -- high-level control -- intermediate system -- LAP-B -- layer -- layered system -- logical link control sublayer (LLC) -- medium access control sublayer (MAC) -- n-entity -- network termination 1 (NT1) -- network termination 2 (NT2) -- n-user -- open system -- open systems architecture -- Open Systems Interconnection (OSI) -- Open Systems Interconnection (OSI)--architecture -- Open Systems Interconnection Specification (OSI)--Protocol -- Open Systems Interconnection--Reference Model (OSI--RM) -- Open Systems Interconnection Definitions (OSI)--Service -- Open Systems Interconnection Management (OSI)--Systems -- peer entity -- peer group -- physical signaling sublayer (PLS) -- protocol -- protocol-control information -- protocol data unit (PDU) -- protocol hierarchy -- service -- service access point (SAP) -- service data unit (SDU) -- SONET -- standardized profile -- TCP -- TCP/IP -- TCP/IP Suite -- terminal endpoint functional group (TE) -- virtual terminal (VT) -- wrapping
Loss/Attenuation
absorption -- absorption band -- absorption coefficient -- absorption index -- absorption loss -- angular misalignment loss -- antenna dissipative loss -- 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 -- numerical aperture loss -- path loss -- precipitation attenuation -- 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
absorption modulation -- 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 differential phase-shift keying (CDPSK) -- conditioned diphase modulation -- continuously variable slope delta modulation (CVSD) -- Costas loop -- cross modulation -- delta modulation (DM) -- delta-sigma modulation -- demand assignment multiple access (DAMA) -- demodulation -- differential modulation -- differential phase-shift keying (DPSK) -- differential pulse-code modulation (DPCM) -- digital frequency modulation -- digital modulation -- digital phase modulation -- direct-sequence modulation -- disparity -- double modulation -- electro-optic modulator -- exalted-carrier reception -- fixed-reference modulation -- frequency modulation (FM) -- frequency-shift keying (FSK) -- full modulation -- incremental phase modulation (IPM) -- indirect control -- intensity modulation (IM) -- isochronous demodulation -- 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-duration modulation (PDM) -- pulse-frequency modulation (PFM) -- pulse-position modulation (PPM) -- quadrature amplitude modulation (QAM) -- quadrature modulation -- quadrature phase-shift keying (QPSK) -- quantization -- quasi-analog transmission -- radio -- reduced carrier single-sideband emission -- reduced carrier 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 -- stereophonic crosstalk -- sub-band adaptive differential pulse code modulation (SB-ADPCM) -- subcarrier -- supergroup distribution frame (SGDF) -- suppressed carrier transmission -- thin-film optical 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 -- digital signal (DS) -- digroup -- drop and insert -- erect position -- fractional T1 -- frame -- framing -- group -- group distribution frame (GDF) -- heterogeneous multiplexing -- homogeneous multiplexing -- inverse multiplexer -- inverted position -- labeled multiplexing -- master frequency generator -- multicarrier modulation (MCM) -- multichannel -- multiframe -- multiplex aggregate bit rate -- multiplex baseband -- multiplexer/demultiplexer (muldem) -- multiplexer (MUX) -- multiplex hierarchy -- multiplexing (MUXing) -- multiplex link encryption -- orthogonal multiplex -- precombining -- pregroup combining -- quadruple diversity -- space-division multiplexing -- statistical multiplexing -- statistical time-division multiplexing -- supergroup distribution frame (SGDF) -- synchronous TDM -- synchronous transfer mode -- system loading -- T-carrier -- thin-film optical multiplexer -- time-division multiple access (TDMA) -- time-division multiplexing (TDM) -- transmultiplexer -- trunk group multiplexer (TGM) -- two-pilot regulation -- wavelength-division multiplexing (WDM)
Networking
access group -- address field -- asynchronous network -- backbone -- branching network -- client -- closed user group -- commercial refile -- control station -- delayed-delivery facility -- democratically synchronized network -- despotically synchronized network -- differentiating network -- directed net -- distributed control -- distributed network -- [[distributed-queue dual-bus [network]]] (DQDB) -- endpoint node -- equivalent network -- free net -- gateway -- global address -- GOSIP -- group address -- hierarchical computer network -- hierarchically synchronized network -- hotline -- hybrid communications network -- hypermedia -- intelligent network (IN) -- intelligent peripheral (IP) -- interconnection -- intermediate element -- internetworking -- interworking functions -- leg -- link -- logical topology -- loop transmission -- maritime broadcast communications net -- master station -- mediation function -- multicast -- multichannel -- multilevel precedence and preemption (MLPP) -- multilink operation -- multiple media -- multipoint access -- net operation -- network -- network control program (NCP) -- network engineering -- network interface -- network interface card -- network topology -- noncentralized operation -- nonsynchronous network -- open network architecture (ONA) -- overhead information -- packet switching -- path -- PCS -- physical topology -- point-to-point link -- polling -- port -- portability -- POSIX -- precedence -- primary channel -- primary station -- public data network (PDN) -- public switched network (PSN) -- radio net -- relay -- remote access -- remote logon -- route -- routine message -- seizing -- server -- service termination point -- signal center -- signal transfer point (STP) -- sliding window -- slot -- slotted-ring network -- slot time -- sublayer -- subnetwork -- switched circuit -- symmetrical channel -- synchronous data link control (SDLC) -- synchronous network -- synchronous transmission -- system failure transfer -- system follow-up -- system signaling and supervision -- tandem -- teleconference -- Terminal Access Controller (TAC) -- terminal adapter -- terminal endpoint functional group (TE) -- through group -- through supergroup -- T-interface -- token-bus network -- token passing -- token-ring network -- trace packet -- unidirectional operation -- U interface -- Universal Personal Telecommunications service (UPT) -- virtual network -- virus -- wrapping
Network Management
accounting management -- administrative management complex (AMC) -- attribute -- customer management complex -- fault management -- managed object -- network administration -- network management -- network manager -- operations system -- performance management -- security management -- system management -- telecommunications management network (TMN)
Networks
ARPANet -- Automatic Digital Network (AUTODIN) -- Automatic Secure Voice Communications Network (AUTOSEVOCOM) -- Automatic Voice Network (AUTOVON) -- command net -- common user network -- communications net -- communications network -- computer network -- Defense Communications System (DCS) -- Defense Data Network (DDN) -- Defense Switched Network (DSN) -- Emergency Broadcast System (EBS) -- integrated digital network (IDN) -- [[[The] Internet]] -- joint multichannel trunking and switching system -- Joint Tactical Information Distribution System (JTIDS) -- National Communications System (NCS) -- National Information Infrastructure (NII) -- value-added network (VAN)
Network Topology/Architecture
client-server architecture -- network architecture -- network connectivity -- network topology -- node -- physical topology -- ring network
Noise
ambient noise level -- antenna noise temperature -- atmospheric noise -- background noise -- blue noise -- carrier noise level -- carrier-to-noise ratio (CNR) -- carrier-to-receiver noise density (C/kT) -- channel noise level -- circuit noise level -- closed-loop noise bandwidth -- C-message weighting -- cosmic noise -- effective input noise temperature -- equipment intermodulation noise -- equivalent noise resistance -- equivalent noise temperature -- equivalent pulse code modulation noise (PCM) -- equivalent satellite link noise temperature -- feeder echo noise -- flat weighting -- FM improvement factor -- FM improvement threshold -- front-end noise temperature -- HA1-receiver weighting -- idle-channel noise -- impulse noise -- in-band noise power ratio -- intermodulation noise -- intrinsic noise -- loop noise -- modal noise -- mode partition noise -- noise -- notched noise -- 144-line weighting -- 144-receiver weighting -- phase noise -- photon noise -- process gain -- proration -- pseudorandom noise -- psophometric weighting -- quantizing noise -- quantum noise -- quantum-noise-limited operation -- random noise -- received noise power -- reference noise -- shot noise -- signal-plus-noise-to-noise ratio ) ((S+N)/N -- signal-to-noise ratio (SNR) -- signal-to-noise ratio per bit -- SINAD -- snow -- stereophonic crosstalk -- thermal noise -- total channel noise -- white noise -- worst hour of the year
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 -- service identification -- Telecommunications Service Priority service (TSP) -- Telecommunications Service Priority system (TSP)
Organizations
administration -- AFNOR -- American National Standards Institute (ANSI) -- Bell Operating Company (BOC) -- Canadian Standards Association (CSA) -- CCIR -- CCITT -- common carrier -- Deutsches Institut für Normung (DIN) -- FCC -- International Telecommunication Union (ITU) -- ISO -- Joint Telecommunications Resources Board (JTRB) -- National Command Authorities (NCA) -- National Communications System (NCS) -- National Coordinating Center for Telecommunications (NCC) -- public utilities commission (PUC) -- Radio Regulations Board (formerly IFRB) -- recognized operating agency (ROA) -- Regional Bell Operating Company (RBOC) -- specialized common carrier (SCC)
PCS/UPT/cellular mobile
base station -- call associated signaling (CAS) -- call management -- cell -- cellular mobile -- fixed access -- interworking functions -- mobile services switching center (MSC) -- non-call associated 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 -- terminal mobility 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 power margin -- sensitivity -- signal level -- signal-to-crosstalk ratio -- SINAD -- singing margin -- single-polarized antenna -- single-sideband equipment reference level (SSB) -- spectral density -- susceptibility threshold -- system loading
Power (Electrical)
apparent power -- auxiliary power -- demand factor -- demand load -- disconnect switch -- effective power -- 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 Data Communication 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) -- NFS -- Open Systems Interconnection Specification (OSI)--Protocol -- ping -- protocol -- protocol-control information -- protocol converter -- protocol data unit (PDU) -- protocol hierarchy -- protocol translator -- remote operations 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 control protocol -- 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 -- carrier synchronization -- cellular mobile -- clear channel -- closed circuit -- combat-net radio (CNR) -- connectivity exchange (CONEX) -- controller -- cross-band radiotelegraph procedure -- coverage -- dead space -- deemphasis -- detector -- deviation ratio -- diffraction region -- digital selective 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 -- Fresnel zone -- harmful interference -- heterodyne repeater -- homing -- horn -- indefinite call sign -- 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 burst communications -- 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-air monitoring -- 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 -- primary service area -- propagation mode -- propagation path obstruction -- protection interval (PI) -- push-to-talk operation -- quadruple diversity -- query call -- radiation -- radio -- radio and wire integration (RWI) -- radio channel -- radio common carrier (RCC) -- radiocommunication -- random access discrete address (RADA) -- reflecting layer -- rural radio service -- rural subscriber station -- scan-stop lockup -- ship Earth station -- 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 switching unit (CSU) -- collective routing -- destination routing -- deterministic routing -- dynamically adaptive routing -- flood search routing -- free routing -- heuristic routing -- hierarchical routing -- hybrid routing -- mediation function -- multicast address -- network administration -- primary route -- 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-satellite service -- 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 the broadcasting-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 terminal complex -- equatorial orbit -- equivalent satellite link noise temperature -- fixed-satellite service -- footprint -- geostationary orbit -- geosynchronous orbit -- handoff -- inclination of an orbit (of an Earth satellite) -- inclined orbit -- [[individual reception [in the broadcasting-satellite service]]] -- inter-satellite service -- 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 operation service -- 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 systems security -- between-the-lines entry -- BLACK -- BLACK signal -- browsing -- bug -- certification -- clipper chip -- code -- communications deception -- communications-electronics (C-E) -- communications intelligence (COMINT) -- communications protection -- [[communications security [COMSEC]]] -- compromise -- computer security (COMPUSEC) -- COMSEC equipment -- configuration management -- controlled area -- controlled security operation -- controlled space -- data security -- electronic emission security -- emanations security (EMSEC) -- emission security -- 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 -- secure transmission -- security -- security filter -- security kernel -- security management -- self-authentication -- sensitive information -- server -- signals security -- transmission security key (TSK) -- trusted computing base (TCB) -- trusted computer system (TCS) -- Warner exemption
Services
aeronautical fixed service -- [[aeronautical mobile [off-route] service]] (OR) -- [[aeronautical mobile [route] service]] (R) -- aeronautical mobile-satellite service -- [[aeronautical mobile-satellite [off-route] service]] (OR) -- [[aeronautical mobile-satellite [route] service]] (R) -- aeronautical mobile service -- aeronautical multicom service -- aeronautical radionavigation-satellite service -- aeronautical radionavigation service -- amateur-satellite service -- amateur service -- Archie -- Armed Forces Radio Service (AFRS) -- attendant position -- base communications (basecom) -- basic exchange telecommunications radio service (BETRS) -- basic service -- basic service element (BSE) -- basic serving arrangement (BSA) -- Centrex® service (CTX) -- class of service -- common management information service (CMIS) -- comparably efficient interconnection (CEI) -- complementary network service (CNS) -- consolidated local telecommunications service -- conversational service -- custom local area signaling service (CLASS) -- dedicated service -- domestic fixed public service -- domestic public radio services -- eight-hundred service (800) -- enhanced service -- facility -- Federal Telecommunications System (FTS) -- five-hundred service (500) -- flat rate service -- foreign exchange service (FX) -- FTS2000 -- interactive service -- intercom -- inter-satellite service -- leased circuit -- maritime mobile-satellite service -- maritime mobile service -- maritime radionavigation-satellite service -- maritime radionavigation service -- message service -- meteorological aids service -- meteorological-satellite service -- mobile-satellite service -- mobile service -- multipoint distribution service -- nine-hundred service (900) -- other common carrier (OCC) -- paging -- PCS -- port operations service -- private NS/EP telecommunications services -- provisioning -- public data transmission service -- public switched network (PSN) -- public switched NS/EP telecommunications services -- public switched telephone network (PSTN) -- radio channel -- radio common carrier (RCC) -- radiodetermination-satellite service -- radiolocation service -- radionavigation-satellite service -- resale carrier -- resale service -- reserved circuit service -- restricted access -- retrieval service -- rural radio service -- rural subscriber station -- safety service -- service access point (SAP) -- service bit -- seven-hundred service (700) -- space research service -- special grade of service -- standard frequency and time signal-satellite service -- teleaction service -- telecommunications service -- Telecommunications Service Priority service (TSP) -- teletex -- teletext -- Telex® -- unbundling -- Universal Personal Telecommunications service (UPT) -- universal service -- viewdata -- voice grade -- white pages -- Wide Area Telephone Service (WATS) -- World Wide Web (WWW)
Service Features
abbreviated dialing -- access control -- add-on conference -- automatic answering -- automatic identified outward dialing (AIOD) -- automatic message accounting (AMA) -- automatic number identification (ANI) -- automatic redial -- automatic sequential connection -- busy verification -- call detail recording (CDR) -- called-line identification facility -- called-party camp-on -- caller ID -- call forwarding -- call hold -- calling-line identification facility -- calling-party camp-on -- call pickup -- call restriction -- calls-barred facility -- call splitting -- call transfer -- call waiting -- classmark -- conference call -- consultation hold -- dial service assistance (DSA) -- dial-up -- direct dialing service -- direct distance dialing (DDD) -- direct inward dialing (DID) -- direct outward dialing (DOD) -- essential service -- extended area service (EAS) -- fixed loop -- group alerting and dispatching system -- line load control -- multiaddress calling -- network inward dialing (NID) -- network outward dialing (NOD) -- remote access -- remote call forwarding -- service feature -- speed calling -- spill-forward feature -- three-way calling -- transit network identification -- verified off-hook -- virtual call -- virtual circuit capability
Standards
ANSI/EIA/TIA-568 -- ASCII -- basic mode link control -- basic rate interface (BRI) -- de facto standard -- frequency standard -- functional profile -- GOSIP -- group -- industry standard -- interface standard -- International Telegraph Alphabet Number 5 (ITA-5) -- interoperability standard -- message handling system (MHS) -- National Electric Code® (NEC) -- network terminal number (NTN) -- NTSC standard -- Open Systems Interconnection (OSI) -- Open Systems Interconnection (OSI)--architecture -- Open Systems Interconnection 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 time standard -- serial -- Signaling System No. 7 (SS7) -- SONET -- standard -- standard optical source -- standard time and frequency signal service (STFS) -- system standard -- terminal adapter -- time standard -- V-series Recommendations -- X.-series Recommendations
Storage
accumulator -- archiving -- arithmetic overflow -- arithmetic register -- arithmetic underflow -- associative storage -- auxiliary storage -- buffer -- cache memory -- CD ROM -- channel -- clear -- computer program origin -- 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-readable medium -- magnetic card -- magnetic core storage -- magnetic drum -- magnetic tape -- main storage -- medium -- memory -- off-line storage -- optical disk -- overlay -- overload -- packing density -- permanent storage -- phase-encoded recording (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-only storage -- record -- record communication -- record information -- record medium -- regeneration -- register -- rotational position sensing -- sector -- sectoring -- seek -- seek time -- shift register -- simple buffering -- skew -- soft sectoring -- spooling -- storage -- storage cell -- store-and-forward (S-F) -- store-and-forward switching center -- streaming tape drive -- streaming tape recording -- tag image file format (TIFF) -- tape relay -- track -- track density -- tracking error -- variable length buffer -- virtual memory -- virtual storage -- volatile storage -- volume -- work space -- write
Switching
analog switch -- broadband exchange (BEX) -- burst switching -- call progress signal -- circuit-switched data transmission service -- circuit switching -- class of office -- common control -- congestion -- crosspoint -- digital switching -- distributed switching -- electronic switching system (ESS) -- fast packet switching -- first-in last-out (FIFO) -- interrupted continuous wave (ICW) -- joint multichannel trunking and switching system -- message switching -- multiple access -- multiple homing -- nonblocking switch -- off-hook signal -- one-way trunk -- pilot-make-busy circuit (PMB) -- private exchange (PX) -- public switched network (PSN) -- public switched NS/EP telecommunications services -- public switched telephone network (PSTN) -- queuing delay -- rotary hunting -- seizing -- semiautomatic switching system -- signal transfer point (STP) -- space-division switching -- spill forward -- split homing -- step-by-step switching system (SXS) -- switch -- switchboard -- switch busy hour -- switching -- synchronous transfer mode -- Tactical Automatic Digital Switching System (TADSS) -- thin-film optical switch -- three-way calling -- time-division switching -- trunk -- wink pulsing
Synchronization
bilateral synchronization -- carrier synchronization -- digital synchronization -- double-ended synchronization -- frame synchronization -- linear analog synchronization -- lip synchronization -- mutually synchronized network -- mutual synchronization -- nonsynchronous data transmission channel -- pilot -- single-ended synchronization -- synchronism -- synchronization -- synchronization bit -- synchronization code -- synchronization pulse -- synchronous -- timing tracking accuracy -- unilateral synchronization system
Telegraphy
A-condition -- Baudot code -- cable -- chad tape -- characteristic distortion -- 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-frequency telegraph (VFTG) -- word
Telephony Hardware
acoustic coupler -- aerial cable -- aerial insert -- applique -- central office (C.O.) -- combined distribution frame (CDF) -- common battery -- conditioned loop -- connecting arrangement -- cord circuit -- cord lamp -- cordless switchboard -- crossbar switch -- cross-connection -- cross-office trunk -- customer office terminal (COT) -- customer service unit (CSU) -- dial switching equipment -- digital access and cross-connect system (DACS) -- digital circuit patch bay -- digital loop carrier (DLC) -- digital primary patch bay -- digital switch -- distribution frame -- drop -- DSA board -- D-type patch bay -- electrically powered telephone -- embedded base equipment -- embedded customer-premises equipment -- end instrument -- end office -- entrance facility -- entrance point -- entrance room -- equal-level patch bay -- equipment room -- equipment side -- exchange -- exchange facilities -- extension bell -- four-wire repeater -- grandfathered systems -- grandfathered terminal equipment -- group distribution frame (GDF) -- high-frequency distribution frame (HFDF) -- individual line -- inside plant -- integrated station -- intercom -- intermediate distribution frame (IDF) -- interoffice trunk -- interposition trunk -- interswitch trunk -- intertoll trunk -- intraoffice trunk -- key set -- key telephone system (KTS) -- K-type patch bay -- limited-protection voice equipment -- line side -- local battery -- local exchange loop -- local side -- main distribution frame (MDF) -- main station -- master frequency generator -- MM patch bay -- new customer premises equipment -- office classification -- off-premises extension (OPX) -- on-premises extension -- orderwire multiplex -- outside plant -- patch and test facility (PTF) -- plant -- private exchange (PX) -- private line -- proration -- protected distribution system (PDS) -- public switched telephone network (PSTN) -- rack -- repertory dialer -- rotary dial -- SECORD -- semiautomatic switching system -- signal center -- sound-powered telephone -- special grade access line -- splice closure -- station battery -- STU -- supergroup distribution frame (SGDF) -- switchboard -- switched circuit -- switched loop -- tandem center -- tandem office -- technical control facility (TCF) -- Telecommunications Device for the Deaf (TDD) -- telecommunications facilities -- telephone -- terminal equipment -- through-group equipment -- through-supergroup equipment -- tie trunk -- translator -- tributary office -- videophone -- vodas -- vogad -- voice frequency primary patch bay (VF)
Television
advanced television (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 white level -- 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 time scale -- Coordinated Universal Time (UTC) -- data transfer time -- date -- date-time group (DTG) -- dating format -- DoD master clock -- epoch date -- equipment clock -- external timing reference -- false clock -- Greenwich Mean Time (GMT) -- heterochronous -- hierarchically synchronized network -- homochronous -- independent clocks -- indirect control -- International Atomic Time (TAI) -- isochronous -- isochronous demodulation -- isochronous modulation -- isochronous signal -- Julian date -- leap second -- local clock -- master clock -- master-slave timing -- mesochronous -- mutually synchronized network -- mutual synchronization -- near real time -- nodal clock -- nonsynchronous network -- oligarchically synchronized network -- plesiochronous -- precise time -- precise time and time interval (PTTI) -- primary time standard -- principal clock -- protection interval (PI) -- pull-in frequency range -- quartz clock -- real time -- reference clock -- release time -- remote clock -- rise time -- rubidium clock -- rubidium standard -- secondary time standard -- serial -- slave clock -- standard frequency and time signal-satellite service -- standard frequency and time signal service -- standard frequency and time signal station -- standard time and frequency signal 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 tracking accuracy -- 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 -- interconnect facility -- line traffic coordinator (LTC) -- loading -- minimize -- narrative traffic -- net control station (NCS) -- off-line recovery -- overflow -- queue -- queue traffic -- queuing -- record traffic -- scanning -- short haul toll traffic -- switch busy hour -- traffic
Transmission/Propagation
absolute delay -- analog transmission -- anisochronous -- anomalous propagation (AP) -- asynchronous transmission -- atmospheric duct -- babble -- backscattering -- batched transmission -- bit-stream transmission -- burst transmission -- channel -- coupled modes -- critical frequency -- critical wavelength -- cross-polarized operation -- Dellinger effect -- digital transmission group -- digital transmission system -- digital voice transmission -- diurnal phase shift -- double-sideband transmission (DSB) -- double-sideband reduced carrier transmission (DSB-RC) -- double-sideband suppressed-carrier transmission (DSB-SC) -- D region -- ducting -- duplex operation -- echo -- electronic line of sight -- elevated duct region erlang -- flutter -- forward scatter -- FOT -- F region -- Fresnel zone -- ground wave -- group velocity -- homogeneous cladding -- intermediate-field region -- ionosphere -- ionospheric absorption -- ionospheric disturbance -- ionospheric forward scatter -- ionospheric reflection -- ionospheric scatter -- ionospheric turbulence -- isochronous burst transmission -- k-factor -- knife-edge effect -- line-of-sight propagation (LOS) -- magnetic storm -- magneto-ionic double refraction -- material scattering -- maximum usable frequency (MUF) -- Mie scattering -- multipath -- near-field region -- near-vertical-incidence skywave -- parallel transmission -- path clearance -- path profile -- primary service area -- propagation -- propagation constant -- propagation mode -- propagation path obstruction -- propagation time delay -- pulse broadening -- quasi-analog transmission -- radiation scattering -- ray -- Rayleigh fading -- Rayleigh scattering -- reflecting layer -- reflection -- refracted ray -- refraction -- refractive index (n, ) -- relative transmission level -- [[right-hand [clockwise] polarized wave]] -- ring latency -- scattering -- scintillation -- serial transmission -- shadow loss -- simplex operation -- skip distance -- skip zone -- sky wave -- smooth Earth -- space diversity -- sporadic E -- sunspot -- surface wave -- synchronous transmission -- time block -- trapped electromagnetic wave -- troposphere -- tropospheric scatter -- tropospheric wave -- undisturbed day -- virtual height -- waveguide
Transmission Lines
artificial transmission line -- balanced line -- building out -- bundle -- cable -- Category 3 -- Category 4 -- Category 5 -- coaxial cable (coax) -- composite cable -- direct-buried cable -- directional coupler -- electrical length -- fiber optic cable -- field wire -- filled cable -- group delay -- hybrid cable -- land line -- lay length -- line -- long line -- loop -- medium -- nonloaded twisted pair -- on-premises wiring -- open wire -- paired cable -- plenum -- quad -- quadded cable -- reflection -- reflection coefficient (RC) -- reflection loss -- return loss -- ribbon cable -- sheath -- sheath miles -- shielded pair -- shielded twisted pair -- skin effect -- slope -- slope equalizer -- spiral-four cable -- strength member -- symmetrical pair -- terminal impedance -- termination -- transmission line -- transverse electric and magnetic mode (TEM) -- transverse electric mode (TE) -- twin cable -- unbalanced line -- underground cable -- uniform transmission line -- voltage standing wave ratio (VSWR) -- zip-cord
Video
average picture level (APL) -- block distortion -- blurring -- color errors -- continuous presence -- contrast -- control field -- edge busyness -- error blocks -- field -- frame -- freeze frame -- image -- interlaced scanning -- jerkiness -- mosquito noise -- motion compensation -- motion response degradation -- 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 -- coherence length -- coherent -- continuous wave (cw) -- depolarization -- doppler effect -- electromagnetic wave (EMW) -- elliptical polarization -- envelope -- group delay -- group delay time -- guided wave -- indirect wave -- left-hand polarized wave (anti-clockwise) -- linear polarization -- material scattering -- microwave -- millimeter wave -- plane wave -- polarization -- polarization diversity -- Poynting vector -- propagation -- pulse carrier -- radiant energy -- radiation -- radio -- radio beam -- radiocommunication -- radio wave -- reflection loss -- reflection -- reflection coefficient (RC) -- [[right-hand [clockwise] polarized wave]] -- scattering -- signature -- spurious response -- square wave -- standing wave -- standing wave ratio (SWR) -- tropospheric wave -- waveform -- wavefront -- waveguide scattering -- wave impedance -- wavelength -- wavelength stability -- wave trap
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