telephone circuit


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telephone circuit

[′tel·ə‚fōn ‚sər·kət]
(electricity)
The complete circuit over which audio and signaling currents travel in a telephone system between the two telephone subscribers in communication with each other; the circuit usually consists of insulated conductors, as ground returns are now rarely used in telephony.
References in periodicals archive ?
To understand how the 202 transmits its data, we should understand the frequency response of a basic telephone circuit.
The advantage of managing a component network composed of modems, telephone circuits, direct digital circuits (DDS) and terminals is that systems and test equipment are available for the management and testing of this type of network.
There is in my mind little doubt that basic or essential telecommunications will rely on the "plain old telephone" and sound broadcasting, the telephone circuit and its associated facilities meeting the demand for various kinds of two-way communications and information transfer.
But the escalating costs of dedicated telephone circuits and the emergence of the Internet as a low-cost, ubiquitous data communications network changed remote computing beginning in the mid-1990s.
A new automatic switching system, known as the crossbar, was therefore developed in which contact is established by moving springs equipped with small bits of precious metal, affording the advantage of reduced time in establishing connections and providing satisfactorily quiet telephone circuits with tower maintenance.
Using personnel from its reserve unit, ASO developed a workable alternative communications system for logistics data by creating a concept that utilized conventional analog telephone circuits, with data modems added at each end.
The price for 600 telephone circuits and a two-way TV channel: $82,000,000.
Despite the town being completely empty by early evening, journalists reported that electric and telephone circuits were still connected.
The sixth pin on the H-350 is often called Pin K Pin F is "hot" and gives the H-350 full-duplex operation over telephone circuits.
A spokesperson for the council said the new system has enabled it to replace separate voice and data networks in the business centre and link it to the main office without the need for any additional investment in new telephone circuits.
Remote Data Terminals (RDT): A Terminal in a data-processing system from which data can be sent to or received from a central computer over telephone circuits, but which exerts no direct operating control over the central computer.
NTT East and West are expected to use other carriers' telephone circuits for inter-prefecture communications and allow them to set inter-prefecture and Internet access charges so that the two will not violate the NTT Law.