JPS5451702A - Automatic power supply cut-off circuit - Google Patents

Automatic power supply cut-off circuit

Info

Publication number
JPS5451702A
JPS5451702A JP11846277A JP11846277A JPS5451702A JP S5451702 A JPS5451702 A JP S5451702A JP 11846277 A JP11846277 A JP 11846277A JP 11846277 A JP11846277 A JP 11846277A JP S5451702 A JPS5451702 A JP S5451702A
Authority
JP
Japan
Prior art keywords
circuit
power supply
called
sent
transmission data
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
JP11846277A
Other languages
Japanese (ja)
Other versions
JPS6019866B2 (en
Inventor
Tatsuo Morimoto
Kenji Mihara
Masahiro Kondo
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP52118462A priority Critical patent/JPS6019866B2/en
Publication of JPS5451702A publication Critical patent/JPS5451702A/en
Publication of JPS6019866B2 publication Critical patent/JPS6019866B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Communication Control (AREA)

Abstract

PURPOSE:To secure an automatic cut-off of the power supply at the calling time, by performing an automatic power supply through detection the call display signal sent from the MODEM at the receiver side of the telephone exchange network and then detecting the OFF of the data terminal ready signal after end of the receiving action. CONSTITUTION:In the circuit which performs the ON-OFF control by the signal sent from the center for the power supply at the calling time of the telephone exchange of the terminal equipment, the display signal called out from MODEM is detected through data terminal ready detecting circuit 10, and then contact circuit 40 to throw in the power source at the called subscriber is turned on. At the same time, the OFF is detected through circuit 10 for the data terminal ready signal after end of the receiving action of the called-side unit. Circuit 10 consists of FF11, AND circuit 12, NAND circuit 13 and INV circuit 14 and 15 respectively, And in case no transmission data is sent for a fixed time, FF11 is turned off by the signals sent from transmission data detecting circuit 20 and transmission data detecting circuit 30 to turn off the power supply of the called-side unit.
JP52118462A 1977-09-30 1977-09-30 Automatic power on/off circuit Expired JPS6019866B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52118462A JPS6019866B2 (en) 1977-09-30 1977-09-30 Automatic power on/off circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52118462A JPS6019866B2 (en) 1977-09-30 1977-09-30 Automatic power on/off circuit

Publications (2)

Publication Number Publication Date
JPS5451702A true JPS5451702A (en) 1979-04-23
JPS6019866B2 JPS6019866B2 (en) 1985-05-18

Family

ID=14737245

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52118462A Expired JPS6019866B2 (en) 1977-09-30 1977-09-30 Automatic power on/off circuit

Country Status (1)

Country Link
JP (1) JPS6019866B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5995750A (en) * 1982-11-25 1984-06-01 Matsushita Electric Ind Co Ltd Home control system
US4484028A (en) * 1982-11-01 1984-11-20 Motorola, Inc. Digital loop transceiver having a power up/down circuit
JPS63155314A (en) * 1986-12-02 1988-06-28 サムスング・エレクトロニクス・カンパニー・リミテッド How to control power supply to modem

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484028A (en) * 1982-11-01 1984-11-20 Motorola, Inc. Digital loop transceiver having a power up/down circuit
JPS5995750A (en) * 1982-11-25 1984-06-01 Matsushita Electric Ind Co Ltd Home control system
JPH0434357B2 (en) * 1982-11-25 1992-06-05 Matsushita Electric Ind Co Ltd
JPS63155314A (en) * 1986-12-02 1988-06-28 サムスング・エレクトロニクス・カンパニー・リミテッド How to control power supply to modem

Also Published As

Publication number Publication date
JPS6019866B2 (en) 1985-05-18

Similar Documents

Publication Publication Date Title
JPS5778237A (en) Fault detection system for control channel of radio telephone set
JPS52130219A (en) Transmission control system for call signal
JPS5451702A (en) Automatic power supply cut-off circuit
JPS562778A (en) Data communication unit
JPS52139302A (en) Automatic circuit switching unit
JPS5564465A (en) Automatic answering telephone set
JPS5792965A (en) Data communication device
JPS5461806A (en) Audio response unit
JPS53117922A (en) Absence reception voice answer skip system
JPS53148307A (en) Automatic answering telephone set
JPS54162905A (en) Radiotelephony equipment
JPS52125213A (en) Absence transfer system
JPS5685963A (en) Called line indicating circuit of telephone set
JPS5671366A (en) Telephone set having communication time elapsed alarm function
JPS5563162A (en) Subscriber line call signal transmission system
JPS5628555A (en) Facsimile unit
JPS5775051A (en) Automatic answering telephone set
JPS5390707A (en) Detecting system for circuit fault
JPS5452915A (en) Facsimile
JPS556948A (en) Test method for subscriber circuit
JPS5643860A (en) Signal discrimination system of circuit terminal
JPS54162903A (en) Radiotelephony transfer system
JPS5793761A (en) Telephone automatic response device
JPS57162868A (en) Data terminal device
JPS56128057A (en) Automatic circuit supervisory unit