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.)
H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/738—Interface circuits for coupling substations to external telephone lines
H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
Interconnected Communication Systems, Intercoms, And Interphones
(AREA)
Rundspruchschaltung fuer Telegraphierzwecke nach Art der Konferenzschaltung, bei der die Teilnehmerleitungen parallel an nur einem Relaiskontakt liegen
Schaltungsanordnung fuer nebengeraeuschfreie Teilnehmerstationen in Fernsprechanlagen mit Waehlerbetrieb, deren Sprechtransformatoren mehrere Wicklungen besitzen