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 AT279680BpublicationCriticalpatent/AT279680B/de
H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/26—Devices for calling a subscriber
H04M1/30—Devices which can set up and transmit only one digit at a time
H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
Devices For Supply Of Signal Current
(AREA)
AT295568A1967-04-051968-03-26Fernsprechteilnehmerstation mit Mehrfrequenzkode-Tastaturwahl
AT279680B
(de)
Schaltungsanordnung für Doppelsuchwahl-Stufen mit Überlaufbündel und Suchwählern in Vermittlungsämtern mit Wählerbetrieb, insbesondere in Fernsprech- und Fernschreibämtern