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Application filed by Telefunken PatentfiledCriticalTelefunken Patent
Application grantedgrantedCritical
Publication of AT278914BpublicationCriticalpatent/AT278914B/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)
Telephone Function
(AREA)
AT100868A1967-02-011968-02-01Schaltungsanordnung für Teilnehmerstationen mit Tastaturwahl in Fernmelde-, insbesondere Fernsprechanlagen
AT278914B
(de)