DTE clear signalA call control signal sent by data terminal equipment (DTE) to initiate clearing.
DTE waiting signalA call control signal, sent by the data-circuit-terminating-equipment/data-terminal-equipment (DCE/DTE) interface, that indicates that the DTE is waiting…
DTMFData Tone Multiple Frequency ( TelComm /Computer term).
dual accessThe connection of a user to two switching centers by separate access lines using a single message routing indicator or telephone number. 2.
dual busA pair of parallel buses arranged such that the direction of data flow in one bus is opposite to the direction of data flow in the other bus.
dual controlIn security systems, a process of using two or more separate individuals (or entities), operating together (but with split knowledge) to protect sensitive…
dual diversityThe simultaneous combining of (or selection from) two independently fading signals, so that the resultant signal can be detected through the use of space…
dual homingThe connection of a terminal so that it is served by either of two switching centers.
dual in-line package (DIP)An electronic package with a rectangular housing and a row of pins along each of two opposite sides.
dual seizureThe condition that occurs when, in both-way operation, two exchanges attempt to seize the same circuit at approximately the same time. [T1.
dual-homed HostA general-purpose computer system that has at least two network interfaces.
dual-precedence messageA message that contains two precedence designations. Note: Usually the higher precedence message is for all action addressees and the lower for all…
dual-tone multifrequency (DTMF) signalingIn telephone systems, multifrequency signaling in which standard set combinations of two specific voice band frequencies, one from a group of four low…
dual-use access lineA user access line normally used for analog voice communication, but which has special conditioning for use as a digital transmission circuit.
dub1. A duplicate copy made in the same format from one recording medium to another. 2. See audio dubbing.
duct1. In interfacility cabling, a conduit, which may be direct-earth buried or encased in concrete, used to enclose communications or power cables.
ductingThe propagation of radio waves within an atmospheric duct.
dumb terminalAn asynchronous terminal that (a) does not use a transmission control protocol and (b) sends or receives data sequentially one character at a time.
dummy loadA dissipative impedance-matched network, usually used at the end of a transmission line to absorb all incident energy.
duobinary signalA pseudobinary-coded signal in which a "0" ("zero") bit is represented by a zero-level electric current or voltage; a "1" ("one") bit is represented by a…
duplex cableA fiber-optic cable that contains two optical fibers. [After FAA]
duplex circuitA circuit that permits transmission in both directions. Note: For simultaneous two-way transmission, see full-duplex circuit.
duplex operationOperating method in which transmission is possible simultaneously, in both directions of a telecommunication channel.
duplexerIn radar systems, a device that isolates the receiver from the transmitter while permitting them to share a common antenna.
Duty CycleThe duration and periodicity of the operation of a device.
dviAbbreviation for digital video interface. A standard for computer-generated multimedia text and graphics merged in video production.
DWDMAbbreviation for dense wavelength division multiplexing.
dwell timeThe period during which a dynamic process remains halted in order that another process may occur.
DX signalingAbbreviation for direct current signaling.
DX signaling unitA duplex signaling unit that repeats "E" and "M" lead signals into a cable pair(s) via "A" and "B" leads.
dynamic arming/disarmingEnabling/disabling of a detection point by a service control function in the course of service control execution for a particular call/service attempt.
dynamic rangeIn a system or device, the ratio of (a) a specified maximum level of a parameter, such as power, current, voltage, or frequency to (b) the minimum…
dynamic variationA short-term variation (as opposed to long-term drift) in the characteristics of power delivered to electrical equipment.
dynamic window controlA procedure to modify the transmitter's transmit window in response to the user's perception of congestion conditions in the network. [T1.615-1992]
dynamically adaptive routingIn route determination for packet-switched networks, adaptive routing in which an algorithm is used that (a) automatically routes traffic around…
dynamically created Web pageA Web page designed to deliver content to users based on information obtained from users, from cookies, or from choices made by users as they access and…