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JPS522202A
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Device for connecting digital unit to digital transmission loop having at least pair of conductors flowing dc
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DE2526058A1
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Direct link digital data transmission system - has control signals easily separated from data without data storage
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CA1051346A
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Direct connection digital transmission apparatus
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GB1499738A
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Direct connection digital data transmission apparatus
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Method and apparatus for in-band signalling in data transmission
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Pseudo balanced constant current supply
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Input circuit for optical signal receiver
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Computer interface coding and decoding apparatus
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Housing and frame assembly for enclosing and supporting electronic apparatus
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Optical data transmission system
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US3665405A
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Multiplexer
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