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H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
H04L25/4902—Pulse width modulation; Pulse position modulation
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Physics & Mathematics
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Spectroscopy & Molecular Physics
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Engineering & Computer Science
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Computer Networks & Wireless Communication
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Signal Processing
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Arrangements For Transmission Of Measured Signals
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Schaltungsanordnung zur UEbertragung von Erkennungszeichen von Leitungen oder Punkten im Verbindungsaufbau von Fernmelde-anlagen, insbesondere von Fernsprechanlagen mit Waehlerbetrieb