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Priority claimed from DE19712106627external-prioritypatent/DE2106627C/de
Application filed by Siemens AgfiledCriticalSiemens Ag
Application grantedgrantedCritical
Publication of AT319346BpublicationCriticalpatent/AT319346B/de
H04Q1/00—Details of selecting apparatus or arrangements
H04Q1/18—Electrical details
H04Q1/30—Signalling arrangements; Manipulation of signalling currents
H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
H04Q1/4535—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted with an additional signal transmitted for voice protection
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Engineering & Computer Science
(AREA)
Computer Networks & Wireless Communication
(AREA)
Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo
(AREA)
AT79172A1971-02-121972-02-01Schaltungsanordnung zur Übermittlung von Mehrfrequenzcodezeichen in Fernmelde-, insbesondere Fernsprechanlagen
AT319346B
(de)