JPS5721158A - Terminal power feeding system - Google Patents

Terminal power feeding system

Info

Publication number
JPS5721158A
JPS5721158A JP9507680A JP9507680A JPS5721158A JP S5721158 A JPS5721158 A JP S5721158A JP 9507680 A JP9507680 A JP 9507680A JP 9507680 A JP9507680 A JP 9507680A JP S5721158 A JPS5721158 A JP S5721158A
Authority
JP
Japan
Prior art keywords
voltage
power supply
terminal
current controller
power
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.)
Granted
Application number
JP9507680A
Other languages
Japanese (ja)
Other versions
JPS6234190B2 (en
Inventor
Yoshio Fujishita
Akira Tomono
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP9507680A priority Critical patent/JPS5721158A/en
Publication of JPS5721158A publication Critical patent/JPS5721158A/en
Publication of JPS6234190B2 publication Critical patent/JPS6234190B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems

Landscapes

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

Abstract

PURPOSE:To simplify the circuit through the constitution of power supply to terminals by the increase/decrease of transmitted voltage from a telephone station only. CONSTITUTION:Normally, a station side current controller 1 is conductive, and a voltage of a main power supply 2 is supplied to terminals b, b' at terminal side via line 3. But, a detector 4 is not operated at this voltage, a terminao current controller 5 keeps nonconductivity and no power is supplied to a receiving power telephone circuit 6. To supply power to the terminal, a booster 7 is operated with a control circuit 8, a voltage at a booster power supply 9 is superimposed on the voltage of a main power supply 2, the boosted voltage is detected at a boosted voltage detector 4 at a terminal b, the terminal current controller 5 is conductive for self- hold. Thus, a temporary boosted voltage is finished by the device 7, then power is supplied to a receiving telephone set circuit 6, and the reception of a digital signal is made possible. To stop the power supply, a station side current controller 1 is made to nonconductive with the control circuit 8.
JP9507680A 1980-07-14 1980-07-14 Terminal power feeding system Granted JPS5721158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9507680A JPS5721158A (en) 1980-07-14 1980-07-14 Terminal power feeding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9507680A JPS5721158A (en) 1980-07-14 1980-07-14 Terminal power feeding system

Publications (2)

Publication Number Publication Date
JPS5721158A true JPS5721158A (en) 1982-02-03
JPS6234190B2 JPS6234190B2 (en) 1987-07-24

Family

ID=14127870

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9507680A Granted JPS5721158A (en) 1980-07-14 1980-07-14 Terminal power feeding system

Country Status (1)

Country Link
JP (1) JPS5721158A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009232520A (en) * 2008-03-19 2009-10-08 Nec Commun Syst Ltd Multiple power source device, power supply method used in the device, and power supply control program

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009232520A (en) * 2008-03-19 2009-10-08 Nec Commun Syst Ltd Multiple power source device, power supply method used in the device, and power supply control program

Also Published As

Publication number Publication date
JPS6234190B2 (en) 1987-07-24

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