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Societe des Compteurs de Geneve SODECO
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Societe des Compteurs de Geneve SODECO
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Application filed by Societe des Compteurs de Geneve SODECOfiledCriticalSociete des Compteurs de Geneve SODECO
Publication of DE2846882B1publicationCriticalpatent/DE2846882B1/de
Application grantedgrantedCritical
Publication of DE2846882C2publicationCriticalpatent/DE2846882C2/de
Verfahren und Schaltungsanordnung zur Erkennung der Schließung einer Gleichstrom gespeisten Teilnehmerschleife in Fernmelde-, insbesondere Fernsprechanlagen
16 KHz telephone metering pulses supply circuitry - uses transistor of opto-coupler followed by monoflop transistor to derive pulses from exchange meter to operate tariff meter at calling subscriber's appts.