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 Sodeco Compteurs De GenevefiledCriticalSodeco Compteurs De Geneve
Publication of CH317317ApublicationCriticalpatent/CH317317A/fr
H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
H04M17/023—Circuit arrangements
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04M—TELEPHONIC COMMUNICATION
H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
H04M15/28—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP with meter at substation or with calculation of charges at terminal
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Engineering & Computer Science
(AREA)
Computer Networks & Wireless Communication
(AREA)
Signal Processing
(AREA)
Computer Security & Cryptography
(AREA)
Interconnected Communication Systems, Intercoms, And Interphones
(AREA)
CH317317D1953-08-141953-08-14Dispositif permettant de commuter, au choix, deux stations téléphoniques branchées sur la même ligne
CH317317A
(fr)