AT75748B - Circuit for individual calling of stations on a common telephone line. - Google Patents

Circuit for individual calling of stations on a common telephone line.

Info

Publication number
AT75748B
AT75748B AT75748DA AT75748B AT 75748 B AT75748 B AT 75748B AT 75748D A AT75748D A AT 75748DA AT 75748 B AT75748 B AT 75748B
Authority
AT
Austria
Prior art keywords
stations
circuit
telephone line
common telephone
individual calling
Prior art date
Application number
Other languages
German (de)
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of AT75748B publication Critical patent/AT75748B/en

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  • Telephonic Communication Services (AREA)

Description

  

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 Schaltwerks wird auf allen Stationen kenntlich, welche Station   angerufen   ist. 



   Die Rückstellung in die Ruhelage erfolgt am Schluss des Gesprächs durch Drehen des Induktors so lange, bis alle Sehaltwerke die Nullage erreicht haben, was am eigenen Apparat geprüft werden kann. 
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 darauffolgende kurze   Stromstösse   und zuletzt wieder einen langen, gleichzeitig dem Auruf dienenden Stromstoss erfolgt, dadurch gekennzeichnet, dass diese langen und kurzen Wählund   Rufströme von   einem von der   Sinusform   abweichende   Wechselströme     erzeugenden Geber   ausgesandt werden, der zugleich mit dem Fernsprechapparat an die Fernsprechleitung über einen   Isoliertransformator angeschlossen ist,   während ein ebenfalls an die Fernleitung angeschaltetes, an sich bekanntes Wechselstromrelais, das nur auf von der Sinusform stark 
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 Schaltwerk is shown on all stations which station is called.



   The return to the rest position takes place at the end of the conversation by turning the inductor until all the Sehaltwerke have reached the zero position, which can be checked on your own device.
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 Subsequent short current impulses and finally another long current impulse which simultaneously serves the call takes place, characterized in that these long and short dialing and ringing currents are sent by an alternating current generator which deviates from the sinusoidal shape and which is connected to the telephone line via an isolating transformer at the same time as the telephone set is, while a well-known AC relay, which is also connected to the long-distance line, is only strong on the sinusoidal shape
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AT75748D 1915-02-05 1916-01-26 Circuit for individual calling of stations on a common telephone line. AT75748B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE75748X 1915-02-05

Publications (1)

Publication Number Publication Date
AT75748B true AT75748B (en) 1919-03-10

Family

ID=5637213

Family Applications (1)

Application Number Title Priority Date Filing Date
AT75748D AT75748B (en) 1915-02-05 1916-01-26 Circuit for individual calling of stations on a common telephone line.

Country Status (1)

Country Link
AT (1) AT75748B (en)

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