JPS564966A - Calling signal transmission system - Google Patents

Calling signal transmission system

Info

Publication number
JPS564966A
JPS564966A JP8107479A JP8107479A JPS564966A JP S564966 A JPS564966 A JP S564966A JP 8107479 A JP8107479 A JP 8107479A JP 8107479 A JP8107479 A JP 8107479A JP S564966 A JPS564966 A JP S564966A
Authority
JP
Japan
Prior art keywords
relay
desk
magnet
signal transmission
mgtn
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP8107479A
Other languages
Japanese (ja)
Inventor
Tokuji Koga
Mutsuo Ezaka
Sadao Tanaka
Toshiyuki Kobayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP8107479A priority Critical patent/JPS564966A/en
Publication of JPS564966A publication Critical patent/JPS564966A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To obtain the function of sending a calling signal out economically by providing expensive timing circuits to one or a few console desk instead of providing them to many magnet trunks respectively. CONSTITUTION:When making a connection between console desk DESK and magnet trunk MGTn, controller CONT puts relay K in operation DESK into operation. Via its contacts K<0> and K<1>, chnnels A and B are gounded to operate relay RG in magnet trunk MGTn and through contacts rg<0> and rg<1>, a call signal of 16Hz is sent out to a magneto telephone set. Through the timing circuit composed of resistance R, bulk capacitor C and contact K<2>, relay K is held a certain time (1-2sec) even after being actuated by controller CONT, so that the operation of relay Rg and call signal transmission in consequence will be held for the certain time.
JP8107479A 1979-06-27 1979-06-27 Calling signal transmission system Pending JPS564966A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8107479A JPS564966A (en) 1979-06-27 1979-06-27 Calling signal transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8107479A JPS564966A (en) 1979-06-27 1979-06-27 Calling signal transmission system

Publications (1)

Publication Number Publication Date
JPS564966A true JPS564966A (en) 1981-01-19

Family

ID=13736232

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8107479A Pending JPS564966A (en) 1979-06-27 1979-06-27 Calling signal transmission system

Country Status (1)

Country Link
JP (1) JPS564966A (en)

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