CH477796A - Verfahren zur Signalisierung in Fernmelde-, insbesondere Fernsprechanlagen
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Verfahren zur Signalisierung in Fernmelde-, insbesondere Fernsprechanlagen
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Publication number
CH477796A
CH477796ACH1013468ACH1013468ACH477796ACH 477796 ACH477796 ACH 477796ACH 1013468 ACH1013468 ACH 1013468ACH 1013468 ACH1013468 ACH 1013468ACH 477796 ACH477796 ACH 477796A
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Application filed by Int Standard Electric CorpfiledCriticalInt Standard Electric Corp
Publication of CH477796ApublicationCriticalpatent/CH477796A/de
Schaltungsanordnung zur Feststellung des Frei- bzw. Besetztzustandes von Zwischenleitungen eines Koppelfeldes in Fernmelde-, insbesondere Fernsprechanlagen