AT25872B - Circuit for telephone exchanges with automatic switching on and off of the ringing current source. - Google Patents

Circuit for telephone exchanges with automatic switching on and off of the ringing current source.

Info

Publication number
AT25872B
AT25872B AT25872DA AT25872B AT 25872 B AT25872 B AT 25872B AT 25872D A AT25872D A AT 25872DA AT 25872 B AT25872 B AT 25872B
Authority
AT
Austria
Prior art keywords
circuit
current source
automatic switching
ringing current
telephone exchanges
Prior art date
Application number
Other languages
German (de)
Original Assignee
Telephonwerke R Stock & Co G M
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
Priority claimed from DE1905165572D external-priority patent/DE165572C/de
Application filed by Telephonwerke R Stock & Co G M filed Critical Telephonwerke R Stock & Co G M
Application granted granted Critical
Publication of AT25872B publication Critical patent/AT25872B/en

Links

Landscapes

  • Interface Circuits In Exchanges (AREA)

Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 
 EMI1.2 
 

 <Desc/Clms Page number 2> 

 
 EMI2.1 
 
 EMI2.2 




   <Desc / Clms Page number 1>
 
 EMI1.1
 
 EMI1.2
 

 <Desc / Clms Page number 2>

 
 EMI2.1
 
 EMI2.2

Claims (1)

<Desc/Clms Page number 3> EMI3.1 <Desc / Clms Page number 3> EMI3.1
AT25872D 1905-04-08 1906-01-04 Circuit for telephone exchanges with automatic switching on and off of the ringing current source. AT25872B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1905165572D DE165572C (en) 1905-04-08

Publications (1)

Publication Number Publication Date
AT25872B true AT25872B (en) 1906-10-10

Family

ID=5685316

Family Applications (1)

Application Number Title Priority Date Filing Date
AT25872D AT25872B (en) 1905-04-08 1906-01-04 Circuit for telephone exchanges with automatic switching on and off of the ringing current source.

Country Status (1)

Country Link
AT (1) AT25872B (en)

Similar Documents

Publication Publication Date Title
AT25872B (en) Circuit for telephone exchanges with automatic switching on and off of the ringing current source.
AT68425B (en) Circuit arrangement for telephone exchanges with automatic call distribution.
AT62688B (en) Circuit arrangement for telephone exchanges with automatic call distribution.
AT70550B (en) Circuit arrangement for telephone exchanges with automatic call distribution.
AT44976B (en) Circuit arrangement for automatic telephone exchanges.
AT37041B (en) Automatic telephone switching system.
AT23475B (en) Circuit arrangement for telephone main stations.
AT44977B (en) Circuit arrangement for automatic telephone exchanges.
AT29402B (en) Automatic telephone switchboard.
AT25888B (en) Circuit arrangement for telephone exchanges.
AT25281B (en) Circuit for telephone exchanges with distribution system.
AT24748B (en) Switching of the interrogation device in telephone exchanges.
AT9919B (en) Circuit arrangement for deactivating the call signals on telephone exchanges.
AT49072B (en) Circuit for setting and switching dialers in automatic telephone systems.
AT25866B (en) Telephone transmitter.
AT25278B (en) Equipment for telephone exchanges with separate plug operation.
AT25878B (en) Switching mode for alternating current distribution.
AT74045B (en) Circuit arrangement for automatically or semi-automatically operated telephone systems with separate setting and speech connection paths.
AT36280B (en) Automatic switch-off device for the call inductor of telephone sets.
AT74825B (en) Telephone switching system.
AT25927B (en) Switching of overvoltage fuses with series resistors.
AT56229B (en) Circuit arrangement for automatic telephone systems.
AT74834B (en) Circuit arrangement for telephone systems with amplifying devices for the voice streams.
AT49071B (en) Switching device for setting voters in automatic telephone exchanges.
AT25876B (en) Arc lamp.