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Priority to JP1978090418UpriorityCriticalpatent/JPS631486Y2/ja
Publication of JPS5515803UpublicationCriticalpatent/JPS5515803U/ja
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Publication of JPS631486Y2publicationCriticalpatent/JPS631486Y2/ja
Single frequency signalling in a radiotelephone communication system with idle condition signal generator at one terminal activated by another terminal
Communication interface between computer and synchronous digital telephone line employing asynchronous data transmission format and having enhanced reliability