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)
Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo
(AREA)
Schaltungsanordnung fuer Fernmelde-, insbesondere Fernsprechanlagen, bei denen die Einschaltung einer Teilnehmerstelle in eine besetzte Gesellschaftsleitung durch Relaisverhindert ist