JPS5662461A - Polarity inversion control device for subscriber telephone line - Google Patents

Polarity inversion control device for subscriber telephone line

Info

Publication number
JPS5662461A
JPS5662461A JP13775079A JP13775079A JPS5662461A JP S5662461 A JPS5662461 A JP S5662461A JP 13775079 A JP13775079 A JP 13775079A JP 13775079 A JP13775079 A JP 13775079A JP S5662461 A JPS5662461 A JP S5662461A
Authority
JP
Japan
Prior art keywords
circuit
change
voltage
polarity inversion
return
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
JP13775079A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6349420B2 (enExample
Inventor
Kazuo Kanai
Shinichiro Segami
Hirohisa Tsuda
Kyoichi Nakakawara
Fukue Ogawa
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.)
Toshiba Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Toshiba Corp
Nippon Telegraph and Telephone Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Nippon Telegraph and Telephone Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13775079A priority Critical patent/JPS5662461A/ja
Publication of JPS5662461A publication Critical patent/JPS5662461A/ja
Publication of JPS6349420B2 publication Critical patent/JPS6349420B2/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
    • H04M19/001—Current supply source at the exchanger providing current to substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
JP13775079A 1979-10-26 1979-10-26 Polarity inversion control device for subscriber telephone line Granted JPS5662461A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13775079A JPS5662461A (en) 1979-10-26 1979-10-26 Polarity inversion control device for subscriber telephone line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13775079A JPS5662461A (en) 1979-10-26 1979-10-26 Polarity inversion control device for subscriber telephone line

Publications (2)

Publication Number Publication Date
JPS5662461A true JPS5662461A (en) 1981-05-28
JPS6349420B2 JPS6349420B2 (enExample) 1988-10-04

Family

ID=15205950

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13775079A Granted JPS5662461A (en) 1979-10-26 1979-10-26 Polarity inversion control device for subscriber telephone line

Country Status (1)

Country Link
JP (1) JPS5662461A (enExample)

Also Published As

Publication number Publication date
JPS6349420B2 (enExample) 1988-10-04

Similar Documents

Publication Publication Date Title
EP0091715A3 (en) System for power supply to and switching of a number of electrical appliances
JPS5662461A (en) Polarity inversion control device for subscriber telephone line
GB1535369A (en) Function generator
JPS5419151A (en) Multishunt constant voltage device
JPS54149447A (en) Signal volume controller
JPS55111664A (en) Multiple output dc/dc converter
JPS5469947A (en) Hysteresis circuit
JPS54149452A (en) Signal level adjustment unit
JPS5780826A (en) Waveform shaping circuit
SU387386A1 (ru) Функциональный преобразователь
JPS5489600A (en) Alarm unit
JPS5757028A (en) Driving circuit
FR2298243A1 (fr) Circuit d'interface pour la commande par multiplexage d'elements a seuil
JPS53145503A (en) Voltage switch circuit
JPS5360624A (en) Waveform signal generator
JPS5474092A (en) Signal transfer system
JPS57103427A (en) Reference clock switching device for analogue-digital converter
FR2406357A1 (fr) Joncteur d'abonne telephonique
JPS5464911A (en) Charging pulse generator
JPS57101430A (en) Termination resistor chip provided with tie-up means
JPS5643576A (en) Clock equipped with voice generator
JPS5550732A (en) Integrated latch circuit
JPS5558631A (en) Asynchronous type reversible counter
JPS5260544A (en) Signal converter circuit
JPS52137960A (en) Pulse pattern generator utilizing electric charge transmission device