Telecommunications — page 10 of 85

Telecommunications terms

901. Brillouin scattering In a physical medium, scattering of lightwaves, caused by thermally driven density fluctuations.
902. Broadband Communications of high capacity and usually of multimedia content.
903. broadband exchange (BEX) A communications switch capable of interconnecting channels having bandwidths greater than voice bandwidth.
904. broadband ISDN (B-ISDN) An Integrated Services Digital Network (ISDN) offering broadband capabilities. Note 1: B-ISDN is an ITU-T proposed (originally a CCITT-proposed) service…
905. broadband system See [in analog technology] wideband.
906. broadcast operation The transmission of signals that may be simultaneously received by stations that usually make no acknowledgement.
907. broadcasting satellite space station A space station in the broadcasting-satellite service (sound broadcasting). [NTIA]
908. broadcasting service A radiocommunication service in which the transmissions are intended for direct reception by the general public.
909. broadcasting station A station in the broadcasting service. [NTIA] [RR]
910. broadcasting-satellite service A radiocommunication service in which signals transmitted or retransmitted by space stations are intended for direct reception by the general public.
911. broadside antenna Synonym billboard antenna.
912. brouter A combined bridge and router that operates without protocol restrictions, routes data using a protocol it supports, and bridges data it cannot route.
913. Browser An application, such as Internet Explorer or Netscape Navigator, used to view and navigate the World Wide Web and other Internet resources.
914. browsing [The] act of searching through information-system (IS) storage to locate or acquire information without necessarily knowing of the existence or the format…
915. brute force attack An attack by a malicious user or malicious software on a computer or operating system to find a secret password or a symmetric encryption key by guessing…
916. BSA Abbreviation for bovine serum albumin.
917. BSE Abbreviation for bovine spongiform encephalopathy. See protein aceous infectious particle.
918. BSI Abbreviation for British Standards Institution.
919. budgeting Synonym proration.
920. buffer A zone of a specified distance around coverage features. Both constant- and variable-width buffers can be generated for a set of coverage features based…
921. buffer amplifier Synonym buffer.
922. Buffer Overflow A condition at an interface under which more input can be placed into a buffer or data holding area than the capacity allocated, overwriting other…
923. Bug A problem with computer software or hardware that causes it to malfunction or crash.
924. build-out delay The maximum variable transmission and processing delay that is permitted in a wideband network.
925. building out The process of adding a combination of inductance, capacitance, and resistance to a cable pair so that its electrical length may be increased by a desired…
926. bulk encryption Simultaneous encryption of all channels of a multichannel telecommunications link.
927. bulletin board A form of electronic messaging in which addressed messages or files are entered by users into a computer or network of computers.
928. bunched frame-alignment signal A frame-alignment signal in which the signal elements occupy consecutive digit positions.
929. bundle A group of related modules on "CPAN". (Also, sometimes refers to a group of command-line switches grouped into one "switch cluster".)
930. buried cable See direct-buried cable.
931. buried plant See direct-buried cable.
932. Burst In solar-terrestrial terms, a transient enhancement of the solar radio emission, usually associated with an active region or flare.
933. burst isochronous Deprecated synonym for isochronous burst transmission.
934. burst switching In a packet-switched network, a switching capability in which each network switch extracts routing instructions from an incoming packet header to…
935. burst transmission Transmission that combines a very high data signaling rate with very short transmission times. 2.
936. Bus A parallel circuit that connects the major components of a computer, allowing the transfer of electric impulses from one connected component to any other.
937. bus interface unit (BIU) See network interface device.
938. bus network See network topology.
939. bus topology See network topology.
940. busy back Deprecated term. See busy signal.
941. busy hour In a communications system, the sliding 60-minute period during which occurs the maximum total traffic load in a given 24-hour period.
942. busy season During a 1-year cycle, the period of 3 consecutive months having the highest busy hour traffic.
943. busy signal In telephony, an audible or visual signal that indicates that no transmission path to the called number is available. Synonym busy tone. 2.
944. busy test In telephony, a test made to determine whether certain facilities, such as a subscriber line or a central office trunk, are available for use.
945. busy tone Synonym busy signal.
946. busy verification In a public switched telephone network, a network-provided service feature that permits an attendant to verify the busy or idle state of station lines and…
947. BW body weight.
948. bypass A surgical procedure in which the doctor creates a new pathway for the flow of body fluids.
949. byte (B) A sequence of contiguous bits (usually 8) considered as a unit. Note: In pre-1970 literature, "byte" referred to a variable-length bit string.
950. C-band 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.
951. C-E Abbreviation for communications-electronics.
952. C-language A general-purpose, high-level, structured computer programming language. Note: C-language was originally designed for and implemented on the UNIX™…
953. C-Message Noise The term "C-Message Noise" denotes the frequency weighted average noise within an idle voice channel.
954. C-message weighting 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.
955. C-Notched Noise 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…
956. C.O. Abbreviation for central office.
957. C2W Abbreviation for command and control warfare.
958. cable An assembly of one or more insulated conductors, or optical fibers, or a combination of both, within an enveloping jacket.
959. cable assembly A cable that is ready for installation in specific applications and usually terminated with connectors.
960. cable cutoff wavelength (λcc) 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…
961. cable fill factor 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.
962. cable headend Synonym [in cable television] headend.
963. cable jacket See sheath.
964. cable modem In CATV systems, a bidirectional high-speed digital communications interface, located on a subscriber's or user's premises, and used, for example, for…
965. cable television relay service (CARS) station A fixed or mobile station used for the transmission of television and related audio signals, signals of standard and FM broadcast stations, signals of…
966. cable TV (CATV) A broadband communications technology in which multiple television channels, as well as audio and data signals, may be transmitted either one way or…
967. cache memory 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…
968. CAD Coronary artery disease. A disease in which there is a narrowing or blockage of the coronary arteries (blood vessels that carry blood and oxygen to the…
969. Call In the bond markets, a call is an issuer's right to redeem bonds it has sold before the date they mature.
970. call abandoned See abandoned call.
971. call acceptance The mechanism that allows a user to be alerted on one terminal and to choose to answer the call on any terminal, not necessarily the one through which…
972. call accepted signal A call control signal sent by the called terminal to indicate that it accepts the incoming call.
973. Call Agent The Call Agent provides call processing, call control, feature control and Operations Administration Maintenance & Provisioning to manage services for a…
974. call associated signaling (CAS) Signaling required for supervision of a bearer service between two end points, including support for the functions of call origination, call delivery, and…
975. call attempt In a telecommunications system, a demand by a user for a connection to another user.
976. call back [The] procedure for identifying and authenticating a remote information-systems (IS) terminal, whereby the host system disconnects the terminal and…
977. call collision The contention that occurs when a terminal and data circuit-terminating equipment (DCE) specify the same channel at the same time to transfer a call…
978. call completion rate The ratio of successfully completed calls to the total number of attempted calls.
979. call control character One of a set of control characters used in call-control signaling. Note: The signals representing call control characters may be used under defined…
980. call control function (CCF) The network intelligence that provides call/connection processing and control. [T1.667-1999]
981. call control signal A member of the set of network management signals used to establish, maintain, or release a call.
982. call data channel (CDC) The logical link between the device performing an electronic surveillance access function and the LEA (law enforcement agency) that primarily carries…
983. call delay The delay that occurs when a call arrives at an automatic switching device and no channel or facility is immediately available to process the call. 2.
984. call detail recording (CDR) A service feature in which call data on a specific telephone extension or group of subscribers are collected and recorded for cost-of-service accounting…
985. call duration The time between (a) the instant a connection, i.e., off-hook condition at each end, is established between the call originator and the call receiver and…
986. call forwarding A service feature, available in some switching systems, whereby calls can be rerouted automatically from one line, i.e.
987. Call Gap CG is a code control that regulates the maximum rate at which calls are released toward a destination code.
988. call hold A service feature in which a user may retain an existing call while accepting or originating another call using the same end instrument.
989. call identifier A network utility that consists of a name assigned by the originating network for each established or partially established virtual call.
990. call intensity Synonym traffic intensity.
991. call management 1. In telegraphy, route selection, signaling, and circuit usage and availability for a call. 2.
992. call originator An entity, such as a person, equipment, or program that originates a call. Synonym calling party.
993. call pickup A service feature of some switching systems enabling a user, by dialing a predetermined code, to answer incoming calls that are directed to another user…
994. call processing The sequence of operations performed by a switching system from the acceptance of an incoming call through the final disposition of the call. 2.
995. call progress signal A call control signal transmitted by the called data circuit-terminating equipment (DCE) to the calling data terminal equipment (DTE) to report (a) the…
996. call progress tone An audible signal returned by a network to a call originator to indicate the status of a call.
997. call receiver An entity, such as a person, equipment, or program to which a call is directed. Synonym called party.
998. call record Recorded data pertaining to a single call.
999. call release time In communication systems, the time interval from initiation of a clearing signal by a terminal until the available-line condition appears on originating…
1000. call restriction A switching system service feature that prevents selected terminals from exercising one or more service features otherwise available from the switching…