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Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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Publication date
Application filed by Philips Gloeilampenfabrieken NVfiledCriticalPhilips Gloeilampenfabrieken NV
Publication of ES202909A1publicationCriticalpatent/ES202909A1/en
Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo
(AREA)
Abstract
Single-sideband carrier wave telephone system in which the transmission of the channels is carried out by two adjacent pairs of conductors in which at least through each pair a group of channels is transmitted in the same direction leaving these two groups within the same band of group frequency having the channels of a group a frequency shift with respect to the channels of the other group being associated with each channel a signaling carrier wave characterized in that at least a plurality of signaling carrier wave frequencies of channels of a group are equal to carrier wave frequencies of channels of the other group and inversely and because the carrier signaling waves are transmitted by the two-pair phantom circuit. (Machine-translation by Google Translate, not legally binding)
ES0202909A1951-04-121952-04-09A telephone system of wave carrier on a single side band (Machine-translation by Google Translate, not legally binding)
ExpiredES202909A1
(en)