All > Technology > Telecommunications
Loosely, the group of microwave frequencies from 4 GHz to 6 GHz used in satellite communications. 2. The band of satellite downlink frequencies between 3.7 and 4.2 GHz. Note 1: For federal procurement purposes, the radio frequency band(s) must be specified using the upper and lower limits of the band, per 47 CFR 300. Note 2: Letter designators of radio frequency bands are imprecise, and in the international community are deprecated and obsolete.
- Browse Related Terms: audio frequency (AF), band, black noise, C-band, noise window, notch, notched noise, preemphasis, Sector, separate channel signaling, Shortwave, Singing Return Loss (High & Low), single-frequency (SF) signaling, speech-plus-signaling, spread spectrum, Sweep Jamming, two-pilot regulation, very high frequency (VHF), voice frequency (VF), white noise
All > Technology > Telecommunications
A general-purpose, high-level, structured computer programming language. Note: C-language was originally designed for and implemented on the UNIX™ operating system.
- Browse Related Terms: Ada®, algorithmic language, array, assembly language, C-language, CASE, COBOL, computer-oriented language, formal top-level specification (FTLS), Fortran, PL/I, procedure-oriented language, programming language, programming system, reserved word, scripting language, statement, symbolic language, symbolic logic, syntax
All > Technology > Telecommunications
The term "C-Message Noise" denotes the frequency weighted average noise within an idle voice channel. The frequency weighting, called C-message, is used to simulate the frequency characteristic of the 5OO-type telephone set and the hearing of the average subscriber.
- Browse Related Terms: articulation index, articulation score (AS), atmospheric noise, background noise, burst, C-Message Noise, C-Notched Noise, common-mode interference, equivalent pulse code modulation (PCM) noise, path intermodulation noise, picowatt, psophometrically weighted, pink noise, presence noise, random noise, sidetone, spurious noise, total channel noise, transmitter power output rating, uniform-spectrum random noise, weighting network, worst hour of the year
All > Technology > Telecommunications
A noise spectral weighting used in a noise power measuring set to measure noise power on a line that is terminated by a 500-type set or similar instrument. Note: The instrument is calibrated in dBrnC.
- Browse Related Terms: C-message weighting, channel noise level, circuit noise level, flat weighting, noise level, psophometric voltage, psophometric weighting, psophometrically weighted dBm, pW, received noise power, reference noise
All > Technology > Telecommunications
The term "C-Notched Noise" denotes the C-message frequency weighted noise on a voice channel with a holding tone, which is removed at the measuring end through a notch (very narrow band) filter.
- Browse Related Terms: articulation index, articulation score (AS), atmospheric noise, background noise, burst, C-Message Noise, C-Notched Noise, common-mode interference, equivalent pulse code modulation (PCM) noise, path intermodulation noise, picowatt, psophometrically weighted, pink noise, presence noise, random noise, sidetone, spurious noise, total channel noise, transmitter power output rating, uniform-spectrum random noise, weighting network, worst hour of the year
All > Technology > Telecommunications
Abbreviation for central office.
- Browse Related Terms: AC, AMI, app, ATM, B, b/s, basecom, BCI, Bd, BOC, BW, C.O., CAD, CATV, CCS, COG, EO, EOW, ESD, ESF, FC, FEP, FIFO, FILO, FO, MFD, MFJ, MHz, MTA, mw, NA, nmi, Np, NPA, NVIS, OD, OPX, OTAR, PLA, PLS, POT, PPP, RAD, RI, RJ, RO, RQ, RSL, RX, s, sr, STP, SX, THD, TLM, TLP, TRANSEC, TX, uv, VNL, XO, XT
All > Technology > Telecommunications
Abbreviation for command and control warfare.
- Browse Related Terms: C2W, ESM, EW, selective jamming
All > Technology > Telecommunications
An assembly of one or more insulated conductors, or optical fibers, or a combination of both, within an enveloping jacket. Note 1: A cable is constructed so that the conductors or fibers may be used singly or in groups. Note 2: Certain types of communications cables, especially long submarine cables but also terrestrial cables, whether the communications media are metallic or optical fiber, may contain metallic conductors that supply power to repeaters (amplifiers). 2. A message sent by cable, or by any means of telegraphy (including wireless means).
- Browse Related Terms: aerial insert, BNC connector, bundle, buried cable, buried plant, cable, cable TV (CATV), coax, filled cable, matching gel, multifiber cable assembly, optical cable assembly, transverse electric and magnetic (TEM) mode, velocity of propagation
All > Technology > Telecommunications
A cable that is ready for installation in specific applications and usually terminated with connectors.
- Browse Related Terms: associated common-channel signaling, ATOW, automatic sequential connection, between-the-lines entry, cable assembly, call duration, combined distribution frame (CDF), connection-oriented data transfer protocol, end instrument, end-of-text character (ETX), end-of-transmission character (EOT), error budget, extension terminal, finished call, multipoint access, multipoint link, nonassociated common-channel signaling, optical link, primary rate access (PRA) path, relay, scan-stop lockup, scroll-mode terminal, terminal equipment, terminal impedance, TRI-TAC equipment
All > Technology > Telecommunications
For a cabled single-mode optical fiber under specified length, bend, and deployment conditions, the wavelength at which the fiber's second order mode is attenuated a measurable amount when compared to a multimode reference fiber or to a tightly bent single-mode fiber.
- Browse Related Terms: acceptance angle, acceptance cone, alpha profile, bound mode, cable cutoff wavelength (λcc), mode volume, multimode distortion, multimode optical fiber, normalized frequency (V), numerical aperture (NA), refracted ray, single-mode optical fiber, skew ray, spot size, step-index profile, vertex angle
All > Technology > Telecommunications
The ratio of cable conductor or cable pair kilometers in use to total cable conductor or cable pair kilometers available in the plant, e.g., the ratio of revenue producing cable pair kilometers in use to total cable pair kilometers in plant. [47 CFR Pt.36-A]
- Browse Related Terms: cable fill factor, cable jacket, coaxial cable (coax), complement (of cable), equivalent pair kilometers, equivalent sheath kilometers, optical fiber jacket, shielded pair, shielded twisted pair, triaxial cable
All > Technology > Telecommunications
Synonym [in cable television] headend.
- Browse Related Terms: cable headend, enhanced-quality television, existing quality television, fanout cable, spiral-four cable, star quadded cable, twin-lead
All > Technology > Telecommunications
In CATV systems, a bidirectional high-speed digital communications interface, located on a subscriber's or user's premises, and used, for example, for Internet access or other digital communications.
- Browse Related Terms: abbreviated address, Access Gateway, cable modem, Client, prefix, remote-network element (R-NE), server, speed of service, virtual terminal (VT)
All > Technology > Telecommunications
A fixed or mobile station used for the transmission of television and related audio signals, signals of standard and FM broadcast stations, signals of instructional television fixed stations, and cablecasting from the point of reception to a terminal point from which the signals are distributed to the public. [47CFR]
- Browse Related Terms: Aeronautical Emergency Communications System (AECS) Plan, attention signal, cable television relay service (CARS) station, community antenna television (CATV), Emergency Broadcast System (EBS), Must-carry (Retransmission), pilot subcarrier, primary service area, Satellite Home Viewer Improvement Act Of 1999 (SHVIA), secondary service area, stereophonic sound subcarrier
All > Technology > Telecommunications
A broadband communications technology in which multiple television channels, as well as audio and data signals, may be transmitted either one way or bidirectionally through an often hybrid (fiber and coaxial) distribution system to a single or to multiple specific locations. CATV originated in areas where good reception of direct broadcast TV was not possible. Now CATV also consists of a cable distribution system to large metropolitan areas in competition with direct broadcasting. The abbreviation CATV originally meant community antenna television. However, CATV is now usually understood to mean cable TV.
- Browse Related Terms: aerial insert, BNC connector, bundle, buried cable, buried plant, cable, cable TV (CATV), coax, filled cable, matching gel, multifiber cable assembly, optical cable assembly, transverse electric and magnetic (TEM) mode, velocity of propagation
All > Technology > Telecommunications
A buffer, smaller and faster than main storage, used to hold a copy of instructions and data in main storage that are likely to be needed next by the processor and that have been obtained automatically from main storage.
- Browse Related Terms: absolute address, addressability, cache memory, computer program origin, fractal, magnetic core storage, main storage, memory, multiprocessor, processing unit, resident, spooling, virtual storage
All > Technology > Telecommunications
Abbreviation for computer-aided design.
- Browse Related Terms: AC, AMI, app, ATM, B, b/s, basecom, BCI, Bd, BOC, BW, C.O., CAD, CATV, CCS, COG, EO, EOW, ESD, ESF, FC, FEP, FIFO, FILO, FO, MFD, MFJ, MHz, MTA, mw, NA, nmi, Np, NPA, NVIS, OD, OPX, OTAR, PLA, PLS, POT, PPP, RAD, RI, RJ, RO, RQ, RSL, RX, s, sr, STP, SX, THD, TLM, TLP, TRANSEC, TX, uv, VNL, XO, XT
Also listed in:
- All > Healthcare > Medicine > Cancer
- All > Science > Weather
- All > Technology > Defense
All > Technology > Telecommunications
In communications, any demand to set up a connection. 2. A unit of traffic measurement. 3. The actions performed by a call originator. 4. The operations required to establish, maintain, and release a connection. 5. To use a connection between two stations. 6. The action of bringing a computer program, a routine, or a subroutine into effect, usually by specifying the entry conditions and the entry point. 7. A customer attempt for which complete address information (e.g., 0-, 911, or 10 digits) is provided to the serving dial tone office. [NECA/FCC]
- Browse Related Terms: automatic switching system, Call, call control signal, call processing, circuit switching, operating time, ringaround, rotary dial, switched loop, unsuccessful call attempt
Also listed in:
- All > Business > Finance > Personal Finance
- All > Recreation > Games > Poker