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 AT256945BpublicationCriticalpatent/AT256945B/de
H04Q1/00—Details of selecting apparatus or arrangements
H04Q1/18—Electrical details
H04Q1/30—Signalling arrangements; Manipulation of signalling currents
H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
Landscapes
Engineering & Computer Science
(AREA)
Computer Networks & Wireless Communication
(AREA)
Interface Circuits In Exchanges
(AREA)
AT398266A1965-05-041966-04-27Schaltungsanordnung für den Empfang von Tastenwählsignalen in Fernmelde-, insbesondere Fernsprechvermittlungsanlagen
AT256945B
(de)
Schaltungsanordnung für Fernmeldevermittlungsanlagen, insbesondere Fernsprechvermittlungsanlagen, für vierdrähtige Verbindungsdurchschaltung über Koppelfelder