AT119268B - Circuit arrangement for telephone sub-centers. - Google Patents

Circuit arrangement for telephone sub-centers.

Info

Publication number
AT119268B
AT119268B AT119268DA AT119268B AT 119268 B AT119268 B AT 119268B AT 119268D A AT119268D A AT 119268DA AT 119268 B AT119268 B AT 119268B
Authority
AT
Austria
Prior art keywords
loop
centers
circuit arrangement
call
main
Prior art date
Application number
Other languages
German (de)
Original Assignee
Ver Telephon Czeija Nissl & Co
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 Ver Telephon Czeija Nissl & Co filed Critical Ver Telephon Czeija Nissl & Co
Application granted granted Critical
Publication of AT119268B publication Critical patent/AT119268B/en

Links

Landscapes

  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Interface Circuits In Exchanges (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Schaltungsanordnung für Telephon-Nebenzentralen. 
 EMI1.1 




   <Desc / Clms Page number 1>
 



  Circuit arrangement for telephone sub-centers.
 EMI1.1

Claims (1)

PATENT-ANSPRUCH : Schaltungsanordnung für Fernsprech-Nebenzentralen zum Anschluss an vollautomatische Hauptzentralen, die nach dem Schleifensystem arbeiten, wobei eine Schleife für das Gespräch nur dann an die Leitung der Nebenzentralenseite gelegt werden kann, wenn ein Anruf von der Hauptzentrale ankommt oder wenn ein Ruf zur Hauptzentrale eingeleitet wurde, dadurch gekennzeichnet, dass die Schleife zwei in Serie mit dem Schleifenrelais (SehR) liegende parallelgeschaltete Kontakte (1, 3) enthält, von denen der eine (3) durch eine vom Nebenzentralenbeamten bewirkte Betätigung vorübergehend ge- schlossen wird, wodurch das Schleifenrelais durch den von der Hauptzentrale kommenden Strom erregt wird und durch Schliessen des anderen Kontaktes (1) die Schleife so lange aufrecht erhält, PATENT CLAIM: Circuit arrangement for telephone secondary centers for connection to fully automatic main centers that work according to the loop system, whereby a loop for the call can only be placed on the line of the secondary center side when a call arrives from the main center or when a call to the main center has been initiated, characterized in that the loop contains two parallel-connected contacts (1, 3) in series with the loop relay (SehR), one of which (3) is temporarily closed by an actuation effected by the secondary central office, whereby the loop relay is activated by the the current coming from the main center is excited and the loop is maintained by closing the other contact (1) als der Schleifenstrom fliesst. EMI2.1 as the loop current flows. EMI2.1
AT119268D 1927-10-27 1927-10-27 Circuit arrangement for telephone sub-centers. AT119268B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT119268T 1927-10-27

Publications (1)

Publication Number Publication Date
AT119268B true AT119268B (en) 1930-10-10

Family

ID=29274266

Family Applications (3)

Application Number Title Priority Date Filing Date
AT113174D AT113174B (en) 1927-10-27 1927-06-17 Circuit arrangement for telephone exchange centers for connection to fully automatic offices.
AT119268D AT119268B (en) 1927-10-27 1927-10-27 Circuit arrangement for telephone sub-centers.
AT116669D AT116669B (en) 1927-10-27 1929-01-31 Circuit arrangement for telephone exchange centers for connection to fully automatic offices.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AT113174D AT113174B (en) 1927-10-27 1927-06-17 Circuit arrangement for telephone exchange centers for connection to fully automatic offices.

Family Applications After (1)

Application Number Title Priority Date Filing Date
AT116669D AT116669B (en) 1927-10-27 1929-01-31 Circuit arrangement for telephone exchange centers for connection to fully automatic offices.

Country Status (1)

Country Link
AT (3) AT113174B (en)

Also Published As

Publication number Publication date
AT113174B (en) 1929-05-10
AT116669B (en) 1930-03-10

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