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- Four-wire_circuit abstract "In telecommunication, a four-wire circuit is a two-way circuit using two paths so arranged that the respective signals are transmitted in one direction only by one path and in the other direction by the other path. Late in the 20th century, almost all connections between telephone exchanges were four-wire circuits, while conventional phone lines into residences and businesses were two-wire circuits.The four-wire circuit gets its name from the fact that, historically, a balanced pair of conductors were used in each of two directions for full-duplex operation. The name may still be applied to, for example, optical fibers, even though only one fiber is required for transmission in each direction. A system can separate the frequency directions by frequency duplex and realize the benefits of a four-wire circuit even while the same wire pair is used in both directions.".
- Four-wire_circuit wikiPageID "41170".
- Four-wire_circuit wikiPageRevisionID "599708717".
- Four-wire_circuit hasPhotoCollection Four-wire_circuit.
- Four-wire_circuit subject Category:Communication_circuits.
- Four-wire_circuit subject Category:Telephony.
- Four-wire_circuit type Artifact100021939.
- Four-wire_circuit type Circuit103033362.
- Four-wire_circuit type CommunicationCircuits.
- Four-wire_circuit type Device103183080.
- Four-wire_circuit type ElectricalDevice103269401.
- Four-wire_circuit type Instrumentality103575240.
- Four-wire_circuit type Object100002684.
- Four-wire_circuit type PhysicalEntity100001930.
- Four-wire_circuit type Whole100003553.
- Four-wire_circuit comment "In telecommunication, a four-wire circuit is a two-way circuit using two paths so arranged that the respective signals are transmitted in one direction only by one path and in the other direction by the other path.".
- Four-wire_circuit label "Four-wire circuit".
- Four-wire_circuit sameAs m.0b8zp.
- Four-wire_circuit sameAs Q5474968.
- Four-wire_circuit sameAs Q5474968.
- Four-wire_circuit sameAs Four-wire_circuit.
- Four-wire_circuit wasDerivedFrom Four-wire_circuit?oldid=599708717.
- Four-wire_circuit isPrimaryTopicOf Four-wire_circuit.