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 Bell Telephone MfgfiledCriticalBell Telephone Mfg
Publication of CH230986ApublicationCriticalpatent/CH230986A/de
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
H04M15/10—Metering calls from calling party, i.e. A-party charged for the communication
Landscapes
Engineering & Computer Science
(AREA)
Computer Networks & Wireless Communication
(AREA)
Signal Processing
(AREA)
Computer Security & Cryptography
(AREA)
Interface Circuits In Exchanges
(AREA)
CH230986D1936-10-021936-10-02Fernmeldeanlage, insbesondere Telephonanlage.
CH230986A
(de)
Schaltungsanordnung fuer Anrufsucher in Fernmelde-, insbesondere Fernsprechanlagen, deren Anschlussleitungen mit bei gebuehren-pflichtigen Verbindungen zu beeinflussenden Schalteinrichtungen ausgeruestet sind
Schaltungsanordnung fuer Fernmeldeanlagen, in denen Sendestellen mit ihren Empfangsstellen ueber eine zweiadrige Verbindungsleitung im Simultan- und Schleifenbetrieb verbunden sind