JPS52142905A - Control device of telephone call current supply - Google Patents

Control device of telephone call current supply

Info

Publication number
JPS52142905A
JPS52142905A JP5909676A JP5909676A JPS52142905A JP S52142905 A JPS52142905 A JP S52142905A JP 5909676 A JP5909676 A JP 5909676A JP 5909676 A JP5909676 A JP 5909676A JP S52142905 A JPS52142905 A JP S52142905A
Authority
JP
Japan
Prior art keywords
control device
current supply
telephone call
call current
telephone
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
JP5909676A
Other languages
Japanese (ja)
Inventor
Takuya Takaragawa
Susumu Mizuguchi
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP5909676A priority Critical patent/JPS52142905A/en
Publication of JPS52142905A publication Critical patent/JPS52142905A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

PURPOSE:To improve the bad influence due to the external inductive noise by electrically insulating between the control circuit of the switchboard equipment and the terminal telephone set in case of the telephone on the train.
JP5909676A 1976-05-24 1976-05-24 Control device of telephone call current supply Pending JPS52142905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5909676A JPS52142905A (en) 1976-05-24 1976-05-24 Control device of telephone call current supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5909676A JPS52142905A (en) 1976-05-24 1976-05-24 Control device of telephone call current supply

Publications (1)

Publication Number Publication Date
JPS52142905A true JPS52142905A (en) 1977-11-29

Family

ID=13103448

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5909676A Pending JPS52142905A (en) 1976-05-24 1976-05-24 Control device of telephone call current supply

Country Status (1)

Country Link
JP (1) JPS52142905A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54159114A (en) * 1978-06-02 1979-12-15 Cselt Centro Studi Lab Telecom Electronic telephone circuit for subscriber channel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54159114A (en) * 1978-06-02 1979-12-15 Cselt Centro Studi Lab Telecom Electronic telephone circuit for subscriber channel
JPS5853542B2 (en) * 1978-06-02 1983-11-30 シ エツセ エ エレ チ−セントロ ステユデイ エ ラボラトリ テレコミニカチオ−ニ エツセ ピ− ア− Electronic telephone circuit for subscriber lines

Similar Documents

Publication Publication Date Title
ES263736A1 (en) Telephone substation apparatus
NO144554C (en) ELECTRICAL TELEPHONE CIRCUIT.
ES464701A1 (en) Dissemblable multi-part electrical connector
JPS52142905A (en) Control device of telephone call current supply
ES374959A1 (en) Shunt rectifiers for introducing, trapping and maintaining an electric current within a superconducting circuit
JPS57162172A (en) Detector for magnetic bubble device
JPS5342652A (en) Transistor circuit
GB1035592A (en) An improved printed circuit panel and a method of making same
JPS5317009A (en) Calling current breaking circuit
JPS5438712A (en) Leased circuit meeting test equipment
SE411089B (en) POWER CIRCUIT TO PROTECT ELECTRONIC SWITCHES IN TELEPHONE STATIONS AGAINST OVERVOLTAGE
JPS531013A (en) Sound source equipment of electronic musical instrument
JPS5242358A (en) Curret switching circuit
JPS5245808A (en) Switchboard telephone circuit
GB774979A (en) Improvements in or relating to methods of forming electrical terminals on a terminalboard or strip
JPS52127106A (en) Trunk connecting system for tone
JPS52101907A (en) Shunt type current switching scanning method
JPS5491110A (en) Trunk equipment
JPS5350644A (en) Active two terminal impedance circuit
JPS53100708A (en) Current supply circuit
JPS5277611A (en) Switching circuit
JPS52106611A (en) Line current control
JPS52109A (en) Trunk packge
GB2050115B (en) Telephone line circuit current supply arrangements
JPS52102608A (en) Direct current supllier circuit