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Swivel joint
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Data modems with automatic equalization, drop-out detection and data echo protection
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Data modem having line verification and automatic disconnect features
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Data modems having data drop-out and data echo protection
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Method and apparatus for performing binary equalization in voice-band phase-modulation modems
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Phase-jump detector and corrector method and apparatus for phase-modulated communication systems that also provides a signal quality indication
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GB1522663A
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Data modems with automatic equalization drop-out detection and data echo protection
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Continuous quantitative signal-display system using light-emitting elements
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Coding and decoding system with multi-level format
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Integrated circuit modem with a memory storage device for generating a modulated carrier signal
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Data modem having line verification and automatic disconnect features
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Apparatus for testing data modems which simultaneously transmit and receive frequency multiplexed signals
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Multiplexed data modem
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DE2321289A1
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MODEM WITH A DYNAMIC MEMORY FOR GENERATING A MODULATED CARRIER SIGNAL
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Data modem having a fast turn-around time over direct distance dialed networks
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Apparatus for tesring data modems which simultaneously transmit and receive freuquency multiplexed signals
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Frequency modulation communication system and digital carrier generator and demodulator for use therein
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Coding and decoding system with multi-level format
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Data modem having phase frequency and amplitude distortion compensating means
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Automatic equalizer circuit
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