JPS522113A - Telephone current suplying system - Google Patents

Telephone current suplying system

Info

Publication number
JPS522113A
JPS522113A JP7655175A JP7655175A JPS522113A JP S522113 A JPS522113 A JP S522113A JP 7655175 A JP7655175 A JP 7655175A JP 7655175 A JP7655175 A JP 7655175A JP S522113 A JPS522113 A JP S522113A
Authority
JP
Japan
Prior art keywords
suplying
telephone
telephone current
current
wired
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
JP7655175A
Other languages
Japanese (ja)
Inventor
Kozo Kamata
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 Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7655175A priority Critical patent/JPS522113A/en
Publication of JPS522113A publication Critical patent/JPS522113A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To improve a transmission characteristic of a system for supplying an electric current from a hybrid coil to a subscriber's telephone enabling of sending DC current to two-wired telephone in a four-wired central telephone exchange.
JP7655175A 1975-06-24 1975-06-24 Telephone current suplying system Pending JPS522113A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7655175A JPS522113A (en) 1975-06-24 1975-06-24 Telephone current suplying system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7655175A JPS522113A (en) 1975-06-24 1975-06-24 Telephone current suplying system

Publications (1)

Publication Number Publication Date
JPS522113A true JPS522113A (en) 1977-01-08

Family

ID=13608385

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7655175A Pending JPS522113A (en) 1975-06-24 1975-06-24 Telephone current suplying system

Country Status (1)

Country Link
JP (1) JPS522113A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109203A (en) * 1980-12-26 1982-07-07 Tanaka Precious Metal Ind Sealing electric contact material
JPS57110641A (en) * 1980-12-26 1982-07-09 Tanaka Kikinzoku Kogyo Kk Electrical contact material for sealing
JPS57110639A (en) * 1980-12-26 1982-07-09 Tanaka Kikinzoku Kogyo Kk Electrical contact material for sealing
JPS57110640A (en) * 1980-12-26 1982-07-09 Tanaka Kikinzoku Kogyo Kk Electrical contact material for sealing
JPS57110635A (en) * 1980-12-26 1982-07-09 Tanaka Kikinzoku Kogyo Kk Electrical contact material for sealing
JPS57126930A (en) * 1981-01-30 1982-08-06 Tanaka Kikinzoku Kogyo Kk Electric contact material for packed use
JPS57126932A (en) * 1981-01-30 1982-08-06 Tanaka Kikinzoku Kogyo Kk Electrical contact material for sealing-in
JPS57126933A (en) * 1981-01-30 1982-08-06 Tanaka Kikinzoku Kogyo Kk Electreical contact material for sealing-in
JPS57126931A (en) * 1981-01-30 1982-08-06 Tanaka Kikinzoku Kogyo Kk Electrical contact material for sealing-in
JPS60181249A (en) * 1984-02-27 1985-09-14 Chugai Electric Ind Co Ltd Electrical contact material made of oxidized and sintered ag-sn-pb alloy

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109203A (en) * 1980-12-26 1982-07-07 Tanaka Precious Metal Ind Sealing electric contact material
JPS57110641A (en) * 1980-12-26 1982-07-09 Tanaka Kikinzoku Kogyo Kk Electrical contact material for sealing
JPS57110639A (en) * 1980-12-26 1982-07-09 Tanaka Kikinzoku Kogyo Kk Electrical contact material for sealing
JPS57110640A (en) * 1980-12-26 1982-07-09 Tanaka Kikinzoku Kogyo Kk Electrical contact material for sealing
JPS57110635A (en) * 1980-12-26 1982-07-09 Tanaka Kikinzoku Kogyo Kk Electrical contact material for sealing
JPS57126930A (en) * 1981-01-30 1982-08-06 Tanaka Kikinzoku Kogyo Kk Electric contact material for packed use
JPS57126932A (en) * 1981-01-30 1982-08-06 Tanaka Kikinzoku Kogyo Kk Electrical contact material for sealing-in
JPS57126933A (en) * 1981-01-30 1982-08-06 Tanaka Kikinzoku Kogyo Kk Electreical contact material for sealing-in
JPS57126931A (en) * 1981-01-30 1982-08-06 Tanaka Kikinzoku Kogyo Kk Electrical contact material for sealing-in
JPS60181249A (en) * 1984-02-27 1985-09-14 Chugai Electric Ind Co Ltd Electrical contact material made of oxidized and sintered ag-sn-pb alloy

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