Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Gerard Marcel Le Neuilly- Sur-Seine Hauts-De-Seine Cardonnel (Frankreich)
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International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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Filing date
Publication date
Application filed by International Standard Electric CorpfiledCriticalInternational Standard Electric Corp
Publication of DE2251879A1publicationCriticalpatent/DE2251879A1/de
Publication of DE2251879B2publicationCriticalpatent/DE2251879B2/de
Application grantedgrantedCritical
Publication of DE2251879C3publicationCriticalpatent/DE2251879C3/de
H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised
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Engineering & Computer Science
(AREA)
Computer Networks & Wireless Communication
(AREA)
Devices For Supply Of Signal Current
(AREA)
Interface Circuits In Exchanges
(AREA)
Monitoring And Testing Of Exchanges
(AREA)
DE197222518791971-10-261972-10-23Schaltungsanordnung zur Abtastung von Fernsprechleitungen
ExpiredDE2251879C3
(de)
Schaltungsanordnung zur Unterdrückung von Störspannungseinflüssen bei der Bewertung des Signalzustandes auf Übertragungsleitungen, insbesondere auf Teilnehmeranschlußleitungen in Fernsprechanlagen
Schaltungsanordnung zur Auswertung des Schleifenzustandes und zur Unterscheidung vonSchleifenwiderstaenden einer Fernmelde-, insbesondere Fernsprechleitung
Schaltungsanordnung zum Erkennen von Gleichstromsignalen vorgegebener Mindestdauer in Fernmeldeanlagen, insbesondere zum Erkennen von Anrufsignalen vorgegebener Dauer in Fernschreibvermittlungsanlagen
Einrichtung zur Erzeugung von aus Folgen von Impulsen und Impulspausen gebildeten, insbesondere fuer die UEbertragung der Wahl in Telephonanlagen geeigneten Steuerkriterien
Legal Events
Date
Code
Title
Description
C3
Grant after two publication steps (3rd publication)