Telecommunications terms starting with T

499 terms

traffic flow confidentiality A confidentiality service to protect against traffic analysis [7498-2].
traffic intensity A measure of the average occupancy of a facility during a specified period of time, normally a busy hour, measured in traffic units (erlangs) and defined…
traffic load The total traffic carried by a trunk or trunk group during a specified time interval.
traffic monitor In a communications network, a service feature that provides basic data on the amount and type of traffic handled by the network.
traffic over first routes A term applied to the routing of traffic and denoting routing via principal route for traffic between any two points as distinguished from alternate…
traffic overflow That condition wherein the traffic offered to a portion of a communication system exceeds its capacity and the excess may be blocked or may be provided…
traffic padding 1. In COMSEC, a countermeasure that generates spurious data in transmission media to make traffic analysis or decryption more difficult. [2382-pt.8] 2.
traffic register See register.
traffic service position system (TSPS) A stored program electronic system associated with one or more toll switching systems which provides centralized traffic service position functions for…
traffic unit Synonym erlang.
traffic usage recorder A device for measuring and recording the amount of telephone traffic carried by a group, or several groups, of switches or trunks.
traffic-flow security The protection resulting from features, inherent in some crypto-equipment, that conceal the presence of valid messages on a communications circuit…
trailer Protocol control information located at the end of a protocol data unit (PDU).
tranquility [The] property whereby the security level of an object cannot change while the object is being processed by an information system (IS). [INFOSEC-99]
transaction Includes any series of related steps carried out as part of a prearranged plan.
transaction application program A program written to meet the requirements of a chosen Transaction Processing (TP) application [POSIX.0].
transaction capabilities (TC) 1. A means based upon the OSI-Reference Model to support applications in telecommunications networks. [T1.667-1999] 2.
transaction integrity The degree to which a transaction flowing through a network reaches its intended destination without impairment of its function, content or meaning.
transaction-oriented application Applications that exchange messages that are time-critical, bursty, and often limited in length, to perform an indivisible or elemental unit of work for…
transceiver A device that performs, within one chassis, both transmitting and receiving functions. 2.
transcoding The direct digital-to-digital conversion from one encoding scheme, such as voice LPC-10, to a different encoding scheme without returning the signals to…
transcoding gain The factor by which the bit rate of a 64-kb/s channel is reduced when transcoding is used, e.g., when a transcoder conforming to ANSI T1.303 (i.e.
transducer A device that converts electrical energy to sound energy, or the reverse. Typically associated with depth finders or fish finders.
TRANSEC Transmission Security.
transfer In a transfer, a 401(k) or IRA custodian or trustee moves the assets in your existing account directly to the custodian or trustee of your new account.
transfer allowed (TFA) A procedure included in the signaling route management (functionality) that is used to inform a signaling point that a signaling route to a specific…
transfer capacity The maximum sustainable rate of information transfer. [T1.627-1993]
transfer characteristics Those intrinsic parameters of a system, subsystem, or equipment which, when applied to the input of the system, subsystem, or equipment, will fully…
transfer controlled (TFC) A procedure included in the signaling route management (functionality) that is used to inform a signaling point of congestion status of a signaling route.
transfer function A mathematical statement that describes the transfer characteristics of a system, subsystem, or equipment. 2.
transfer mode In an integrated services digital network, (ISDN), a method of transmitting, multiplexing, and switching.
transfer prohibited (TFP) A procedure included in the signaling route management (functionality) that is used to inform a signaling point of the unavailability of a signaling route.
transfer rate See data transfer rate.
transfer restricted (TFR) A procedure included in the signaling route management (functionality) that is used to inform a signaling point of the restriction of a signaling route.
transfer syntax That concrete syntax used in the transfer of data between open systems. [T1.208-1989]
transient A keyword in the Java programming language that indicates that a field is not part of the serialized form of an object.
transit delay Between two given points in an integrated services digital network (ISDN), the time between the moment that the first bit of a data unit, such as a frame…
transit network identification A network service feature that specifies the sequence of networks used to establish or partially establish a virtual circuit.
transit network section A network section between two internet circuit sections. [T1.504-1989]
transit node A node that interfaces with other nodes, and does not directly interface with customer equipment. [T1.101-1999]
transit time Synonym phase delay.
transition These are where one type of bottom material or structure changes to another, for instance, a rock pile to solid rock, or sand to gravel.
transition frequency The frequency associated with the difference between two discrete energy levels in an atomic system, given by where f 2,1 is the frequency associated with…
transition zone Synonym intermediate-field region.
translate In cryptography, the process of offset decrypting a key or set of keys using a transportation key shared with one center and then offset encrypting the…
translating program Synonym translator.
translation signaling point (TSP) A signaling point that performs SCCP (signal connection control part) global title translation. It is also known as SCCP Relay Node.
translator A device that converts information from one system of representation into equivalent information in another system of representation.
transliterate To turn one string representation into another by mapping each character of the source string to its corresponding character in the result string.
Transmission To cause spread of germs.
transmission block A group of bits or characters transmitted as a unit and usually containing an encoding procedure for error control purposes. 2.
transmission buffer Storage (viz., buffer storage) in the signaling link control for signal units not yet transmitted. [After T1.110-1987]
transmission channel See channel.
transmission coefficient The ratio of the transmitted field strength to the incident field strength of an electromagnetic wave when it is incident upon an interface surface…
transmission control character See control character.
transmission control protocol A network protocol that controls host-to-host transmissions over packet-switched communication networks.
transmission frame A data structure, beginning and ending with delimiters, that consists of fields predetermined by a protocol for the transmission of user data and control…
transmission level At a specified point in a telecommunications system, the power that is measured when a standard test signal, e.g.
transmission level point (TLP) In a telecommunications system, a test point, i.e., a point where a signal may be inserted or measured, and for which the nominal power of a test signal…
Transmission line A set of electrical current conductors, insulators, supporting structures, and associated equipment used to move large quantities of power at high…
transmission loss The decrease in power that occurs during transmission from one point to another. Note: Transmission loss is usually expressed in dB.
Transmission Measuring (105 Type) Test Line/Responder The term "Transmission Measuring (105 Type) Test Line/Responder" denotes an arrangement in an end office which provides far-end access to a responder and…
transmission medium Any material substance, such as fiber-optic cable, twisted-wire pair, coaxial cable, dielectric-slab waveguide, water, and air, that can be used for the…
Transmission Security (TRANSEC) That component of security, which results from all measures, designed to protect communications transmissions from interception and traffic analysis.
transmission security key (TSK) [A] key that is used in the control of TRANSEC (transmission security) processes, such as frequency hopping and spread spectrum. [INFOSEC-99]
transmission service channel In video systems, the one-way transmission path between two designated points.
Transmission Specifications The term "Transmission Specifications" denotes the appropriate limits, e.g., acceptance and immediate action limits, of the Access Service transmission…
transmission system Part of a communication system organized to accomplish the transfer of information from one point to one or more other points by means of signals.
transmission time In facsimile, the interval between the start of picture signals and the detection of the end-of-message signal by the receiver for a single document.
transmission window Synonym spectral window. See window.
Transmissivity The rate at which water of the prevailing kinematic viscosity is transmitted through a unit width of the aquifer under a unit hydraulic gradient.
transmit flow control In data communications systems, control of the rate at which data are transmitted from a terminal so that the data can be received by another terminal.
transmit objective loudness rating (TOLR) The ratio in dB of the sound pressure produced by a speaker to the voltage produced by a telephone and loop as defined by ANSI/IEEE 661-1997. [T1.255-1997]
transmit signal The signal sent across an interface la or lb from the associated equipment. [T1.408-1990]
transmit-after-receive time delay The time interval from removal of rf energy at the local receiver input until the local transmitter is automatically keyed on and the transmitted rf…
transmittance The ratio of the transmitted power to the incident power. Note 1: In optics, transmittance is usually expressed as optical density or in percent.
Transmitter Sends the electronic return data directly to the IRS.
transmitter attack-time delay The interval from the instant a transmitter is keyed-on to the instant the transmitted radio frequency (rf) signal amplitude has increased to a specified…
transmitter central wavelength range (λtmax - λtmin) In optical communication, the total allowed range of transmitter central wavelengths caused by the combined worst-case variations due to manufacturing…
transmitter power output rating The power output of a radio transmitter under stated conditions of operation and measurement.
transmitter release-time delay The interval from the instant a transmitter is keyed-off to the instant the transmitted radio frequency (rf) signal amplitude has decreased to a specified…
transmitter-receiver pair A one-way 15-kHz program system comprised of a transmitting terminal connected via a DS1 digital link to a receiving terminal. [T1.305-1990]
transmultiplexer Equipment that transforms signals derived from frequency-division multiplex equipment, such as group or supergroups, to time-division-multiplexed signals…
Transparency Transparency is a measure of how much information you have about the markets where you invest, the corporations whose stocks or bonds you buy, or the…
transparent interface An interface that allows the connection and operation of a system, subsystem, or equipment with another without modification of system characteristics or…
transparent loopback A loopback in which the signal is transmitted beyond the loopback point (the forward signal).
transparent network See transparency.
Transponder A receiver-transmitter that will generate a reply signal upon proper interrogation.
transport To move or be conveyed from one place to another. In the context of environmental contamination, a contaminant is transported from one location to another…
Transport Layer See Open Systems Interconnection--Reference Model.
transport overhead The overhead added to the STS SPE (synchronous transport signal -- synchronous payload envelope) for transport purposes.
transportability In communications, the quality of equipment, devices, systems, and associated hardware that permits their being moved from one location to another to…
transportable station A station which is transferred to various fixed locations but is not intended to be used while in motion. [NTIA]
transposition The movement of a DNA segment within the genome of an organism.
transverse electric (TE) mode A mode whose electric field vector is normal to the direction of propagation. Note: TE modes may be useful modes in waveguides.
transverse electric and magnetic (TEM) mode A mode whose electric and magnetic field vectors are both normal to the direction of propagation.
transverse magnetic (TM) mode A mode whose magnetic field vector is normal to the direction of propagation. Note: TM modes may be useful in waveguides.
transverse offset loss Synonym lateral offset loss.
transverse parity check A parity check performed on a group of binary digits recorded on parallel tracks of a data medium, such as a magnetic disk, tape, drum, or card.
transverse redundancy check (TRC) In synchronized parallel bit streams, a redundancy check (a) that is based on the formation of a block check following preset rules, (b) in which the…