Two-wire circuit
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What links here
Four-wire circuit
Duplex (telecommunications)
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Intercom
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Long-distance calling
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DMS-100
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Telephone hybrid
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Synchronous Data Link Control
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Live from Baghdad (film)
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Impedance matching
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Index of electronics articles
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Autovon
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Frequency-division multiplexing
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Cable modem
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S interface
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Single-frequency signaling
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Interface standard
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Hybrid transformer
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Four-wire terminating set
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Direct distance dialing
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Telephone
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Electromagnetic coil
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