Telecommunications — page 84 of 85

8,405 terms including subtopics (8,400 terms filed directly here)

Telecommunications terms

white pages A hard copy telephone directory listing of subscriber names, addresses, and telephone numbers.
white peak In video, a peak excursion of the picture signal in the white direction. [After IEEE-100] [After SMPTE]
white point In video technology, that point on the chromaticity diagram having the tristimulus of a source appearing white under the viewing conditions; i.e.
white reference 1. In video teleconferencing, the light from a nonselective diffuse reflector (in the original scene) that is lighted by the normal illumination of the…
white signal In facsimile systems, the signal resulting from scanning a minimum-density area, i.e., the white area, of the object.
white space Characters used to create visual spacing within a program. White spaces include space, tab, carriage return and line feed characters.
whiteboard A feature of an Internet videoconferencing program that allows participants to use drawing and/or annotation tools to develop collaborative images or to…
who-are-you (WRU) character A transmission-control character used for (a) switching on an answer-back unit in the station with which the connection has been established, (b)…
Whois Each domain has an owner of record. Ownership data is stored in the Whois record for that domain.
Wide Area Information Server (WAIS) (WAIS) A client/server software system that provides sophisticated indexing of files based on all words in each file and provides scoring and "relevance…
Wide area network (WAN) (WAN) Computer data communications technology that connects computers at remote sites.
Wide Area Telephone Service (WATS) A toll service offering for customer dial type telecommunications between a given customer station and stations within specified geographic rate areas…
wide track A set of two or more adjacent tracks written on a diskette with the same data, as part of a method of copy protection. [2382-pt.8]
wideband The property of any communications facility, equipment, channel, or system in which the range of frequencies used for transmission is greater than 0.
wideband channel A communication channel of a bandwidth equivalent to twelve or more voice grade channels. [47 CFR Pt.36-A]
wideband modem A modem whose modulated output signal can have an essential frequency spectrum that is broader than that which can be wholly contained within, and…
wild-point detection Synonym reasonableness check.
Wildcard A wildcard character can be used to substitute for any other character or characters in a string.
wildcard character A character that is used to represent optional characters at the front, middle, or end of a search term.
WIN Abbreviation for WWMCCS Intercomputer Network.
Window A generic term for a glazed opening that allows daylight to enter into a building and can be opened for ventilation.
windowing Sectioning of a video display area into two or more separate regions for the purpose of displaying images from different sources.
wink In telephone switching systems, a single supervisory pulse, i.e., the momentary presence of, or interruption of, a supervisory signal.
wink pulsing In telephone switching systems, recurring pulsing in which the off-condition is relatively short compared to the on-condition.
wink-start signal An off-hook condition applied to the NI (network interface) by the CI (customer installation) for a timed interval that indicates the CI recognizes a…
wire center The location of one or more local switching systems; a location where customer loops converge. [T1.222-1991]
wired community Synonym cybercommunity.
wired radio frequency systems Systems employing restricted radiation devices in which the radio frequency energy is conducted or guided along wires or in cables, including electric…
wireless Descriptive of a network or terminal that uses electromagnetic waves (including rf, infrared, laser, visible light-and acoustic energy) rather than wire…
wireless access Terminal access to the network which uses wireless technology. [T1.Rpt22-1993]
wireless access mode In personal communications service, interfacing with a network access point by means of a standardized air interface protocol without the use of a…
Wireless E911 ESRD/ESRK Number A 10-digit number used for the purpose of routing an E911 call to the appropriate Public Service Answering Point (PSAP) when that call is originating from…
wireless mobility management In Personal Communications Service (PCS), the assigning and controlling of wireless links for terminal network connections.
wireless services provider A company that provides wireless telecommunication service to customers, e.g., cellular service providers, radio common carriers, paging companies. [T1.
wireless terminal Any mobile terminal, mobile station, personal station, or personal terminal using non-fixed access to the network.
wireline A term associated with a network or terminal that uses metallic wire conductors (and/or optical fibers) for telecommunications. [After T1.414-1998]
wireline access Terminal access to the network which uses wireline technology (e.g., conventional telephone sets and subscriber lines). [T1.Rpt19-1993]
wireline access mode Interfacing with the network via a physical wired connection. This can be employed by either a wired or wireless terminal operating in a wired mode via a…
wireline common carrier A telecommunications common carrier that is also engaged in the business of providing landline local exchange telephone service. [47CFR]
wizard An intelligent, trainable Web spider. Synonyms droid, smart bot, spider.
word In normal "computerese", the piece of data of the size most efficiently handled by your computer, typically 32 bits or so, give or take a few powers of 2.
word length The number of characters or bits in a yyword.
word processing The use of a computer system to manipulate text. Note: Examples of word processing functions include entering, editing, rearranging, sorting, storing…
work space In computers and data processing systems, the portion of main storage that is used by a computer program for the temporary storage of data.
work station In automated systems, such as computer, communications, and control systems, the input, output, display, and processing equipment that provides the…
working channels The channels over which working traffic is normally transported. [T1.Rpt31-1994]
working key A key generated by the constructive process. [After X9.69]
working loop A revenue producing pair of wires, or its equivalent, between a customer's station and the central office from which the station is served. [47 CFR Pt.
working traffic Traffic traversing a ring normally carried in working channels, except in the event of a ring or span diversity routing, in which case it is restored on…
World Numbering Plan A plan created by the International Telegraph and Telephone Consultative Committee (CCITT--now, the ITU-T) that provides each telephone subscriber with a…
World Time Synonym Coordinated Universal Time.
World Wide Web The WWW is made up of all of the computers on the Internet which use HTML-capable software (Netscape, Explorer, etc.) to exchange data.
WORM See write once read many (WORM).
worst hour of the year That hour of the year during which the median noise over any radio path is at a maximum.
wrapping In a network using dual counter-rotating yyring architecture, reconfiguration to circumvent a failed link or node. 2.
write To make a permanent or transient recording of data in a storage device or on a data medium. 2.
write access An access right that gives permission to yywrite data. Note: Write access may grant permission to append, modify, delete, or create data. [2382-pt.8]
write cycle time The minimum time interval between the starts of successive yywrite cycles of a storage device that has separate reading and writing cycles.
write head A magnetic head capable of writing only.
write protection label See write-protect tab.
write-protect tab A movable or removable tab, label, or other device, the presence or absence of which on the casing of a recording medium prevents writing on the medium.
WRU See who-are-you (WRU) character.
WRU signal Synonym who-are-you character (WRU).
WWW robot A variety of search engine that automatically moves through Web hyperlinks to compile databases of available URLs (universal resource locators).
WYSIWYG What You See Is What You Get Display and software technology which shows on the computer screen exactly what will print.
X-bits Unassigned overhead bits. Transmitters should code these bits as zeros while receivers are required to be capable of ignoring the value contained in these…
X-dimension of recorded spot In facsimile systems, the effective recorded spot dimension measured in the direction of the recorded line.
X-dimension of scanning spot In facsimile systems, the distance between the centers of adjacent scanning spots measured in the direction of the scanning line on the object.
x-y mount Synonym altazimuth mount.
X.-series Recommendations Sets of data telecommunications protocols and interfaces defined by CCITT (now, ITU-T) Recommendations. Note: Some of the more common X.
X.75 Gateway Service A protocol for network interworking which supports communication between adjacent networks and communication thru transit networks.
xerographic recording Recording enabled by the scanning action of an optical beam on a photoconducting surface on which an electrostatically charged latent image is developed…
XML See Extensible Markup Language.
XO Executive Officer.
XOFF An abbreviation for the ASCII transmission-control character meaning "Transmitter off."
XON An abbreviation for the ASCII transmission-control character meaning "Transmitter on."
XT Abbreviation for crosstalk.
Y-dimension of recorded spot In facsimile systems, the distance between the centers of adjacent recorded spots on adjacent lines measured perpendicular to the recorded line.
Y-dimension of scanning spot In facsimile systems, the distance between the centers of adjacent scanning spots on adjacent lines measured perpendicular to the scanning line on the…
Yagi antenna A linear end-fire antenna, consisting of three or more half-wave elements (one driven, one reflector, and one or more directors).
yellow alarm An indication provided to a source device indicating a signal failure condition at a sink device. [T1.
yellow alarm signal Synonym yellow alarm.
Z Zulu time; the same as Universal Coordinated Time (UTC), i.e. 18z is the same as 18:00 UTC.
Z Time Abbreviation for Zulu Time. See Coordinated Universal Time.
ZBTSI (zero-byte time slot interchange) A technique applied to a DS1 frame to ensure pulse density requirements are met, where bits 2 through 193 of each frame are scrambled to minimize the…
zero dBm transmission level point (0 dBm TLP) In a communication system, a point at which the reference level is 1 mW, i.e., 0 dBm.
zero dispersion window Synonym minimum-dispersion window.
zero insertion See zero-bit insertion.
zero stuffing See zero-bit insertion.
zero suppression The elimination of nonsignificant zeros from a numeral.
zero transmission level point (0TLP) Synonym zero dBm transmission level point.
zero-bit insertion : A bit-stuffing technique used with bit-oriented protocols to ensure that six consecutive "1" bits never appear between the two flags that define the…
zero-dispersion slope In a single-mode optical fiber, the rate of change of dispersion, with respect to wavelength, at the fiber's zero-dispersion wavelength.
zero-dispersion wavelength In a single-mode optical fiber, the wavelength or wavelengths at which material dispersion and waveguide dispersion cancel one another.
zero-level decoder A decoder that yields an analog level of 0 dBm at its output when the input is the digital milliwatt signal. [47CFR] Note: The signal is a 1-kHz sine wave.
zerofill To fill unused storage locations in an information system (IS) with the representation of the character denoting "0". [INFOSEC-99]
zeroize To remove or eliminate the key from a crypto-equipment or fill device. [INFOSEC-99]
zeroized Electronically stored data that have been degaussed, erased, or overwritten. [After X9.17]
zip-cord In optical communications, a two-fiber cable consisting essentially of two single-fiber cables having their jackets conjoined by a strip of jacket…
Zone A geographical area shown on a Flood Hazard Boundary Map or a Flood Insurance Rate Map that reflects the severity or type of flooding in the area.