Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Telefunken PatentfiledCriticalTelefunken Patent
Application grantedgrantedCritical
Publication of AT254285BpublicationCriticalpatent/AT254285B/de
H04M3/22—Arrangements for supervision, monitoring or testing
H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
Interface Circuits In Exchanges
(AREA)
AT96566A1965-03-031966-02-02Schaltungsanordnung für Fernmelde-, insbesondere Fernsprechanlagen mit Gleichstromspeisung der Teilnehmerstellen
AT254285B
(de)