JPS5710570A - Pulse signal transmission system for control between telephone exchanger and its terminal device - Google Patents

Pulse signal transmission system for control between telephone exchanger and its terminal device

Info

Publication number
JPS5710570A
JPS5710570A JP8479580A JP8479580A JPS5710570A JP S5710570 A JPS5710570 A JP S5710570A JP 8479580 A JP8479580 A JP 8479580A JP 8479580 A JP8479580 A JP 8479580A JP S5710570 A JPS5710570 A JP S5710570A
Authority
JP
Japan
Prior art keywords
terminal device
pulse signal
telephone exchanger
supply
control
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
JP8479580A
Other languages
Japanese (ja)
Inventor
Masaji Muranaka
Iwamasa Nishikado
Yuichi Morikawa
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 JP8479580A priority Critical patent/JPS5710570A/en
Publication of JPS5710570A publication Critical patent/JPS5710570A/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

Landscapes

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

Abstract

PURPOSE:To improve workability of connection of transmission line to a telephone exchanger and its terminal device, by obtaining the transmission of control pulse signal and supply of DC power supply with a given polarity. CONSTITUTION:The transmission of control pulse signal between transmission and reception circuits 2 in a telephone exchanger 4 is made through a common transmission line 12, full wave rectifying circuit 15 and DC blocking and coupling circuit 17, and the production of operating power supply and supply to a supply circuit 3 at a terminal device 4 of the DC power supply from the device 1 is made via the common transmission line 12, the rectifier circuit 15 and an AC blocking and coupling circuit 16.
JP8479580A 1980-06-23 1980-06-23 Pulse signal transmission system for control between telephone exchanger and its terminal device Pending JPS5710570A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8479580A JPS5710570A (en) 1980-06-23 1980-06-23 Pulse signal transmission system for control between telephone exchanger and its terminal device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8479580A JPS5710570A (en) 1980-06-23 1980-06-23 Pulse signal transmission system for control between telephone exchanger and its terminal device

Publications (1)

Publication Number Publication Date
JPS5710570A true JPS5710570A (en) 1982-01-20

Family

ID=13840628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8479580A Pending JPS5710570A (en) 1980-06-23 1980-06-23 Pulse signal transmission system for control between telephone exchanger and its terminal device

Country Status (1)

Country Link
JP (1) JPS5710570A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61184342U (en) * 1985-05-08 1986-11-17

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50159204A (en) * 1974-06-11 1975-12-23
JPS55121791A (en) * 1979-03-12 1980-09-19 Iwatsu Electric Co Ltd Trunk connection control system for key telephone system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50159204A (en) * 1974-06-11 1975-12-23
JPS55121791A (en) * 1979-03-12 1980-09-19 Iwatsu Electric Co Ltd Trunk connection control system for key telephone system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61184342U (en) * 1985-05-08 1986-11-17
JPH0346603Y2 (en) * 1985-05-08 1991-10-02

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