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Publication date
Application filed by Bell Telephone MfgfiledCriticalBell Telephone Mfg
Publication of CH220874ApublicationCriticalpatent/CH220874A/de
H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
H04M15/08—Metering calls to called party, i.e. B-party charged for the communication
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Engineering & Computer Science
(AREA)
Computer Networks & Wireless Communication
(AREA)
Signal Processing
(AREA)
Interface Circuits In Exchanges
(AREA)
CH220874D1937-01-141938-01-10Einrichtung in Fernmelde-, insbesondere in Telephonanlagen.
CH220874A
(de)
Schaltungsanordnung für Fernmeldevermittlungsanlagen, insbesondere Fernsprechvermittlungsanlagen, mit verbindungsindividuellen Schalteinrichtungen, z.B. Relaisverbindungssätzen
Test switch for optionally connecting a special device or an automatic measuring or test line circuit to an analog line coming from a telephone exchange