Four-wire terminating set: Difference between revisions
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'''four-wire terminating set''' is a [[balanced]] transformer used to perform a conversion between 4-wire and 2-wire [[operation]] |
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For example, a 4-wire [[circuit]] may, by means of a 4-wire terminating set, be connected to a 2-wire [[telephone]] set. Also, a pair of 4-wire terminating sets may be used to introduce an intermediate 4-wire [[loop (telecommunication)|loop]] into a 2-wire circuit, in which loop repeaters may be situated to amplify signals in each direction without positive [[feedback]] and oscillation. |
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Four-wire terminating sets have been largely supplanted by resistance hybrids. |
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Source: from [[Federal Standard 1037C]] and from [[MIL-STD-188]] |
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Revision as of 21:13, 27 July 2004
A four-wire terminating set is a balanced transformer used to perform a conversion between 4-wire and 2-wire operation in telecommunication systems.
For example, a 4-wire circuit may, by means of a 4-wire terminating set, be connected to a 2-wire telephone set. Also, a pair of 4-wire terminating sets may be used to introduce an intermediate 4-wire loop into a 2-wire circuit, in which loop repeaters may be situated to amplify signals in each direction without positive feedback and oscillation.
Four-wire terminating sets have been largely supplanted by resistance hybrids.