[go: up one dir, main page]

JPS56157166A - Start deciding circuit of network control device - Google Patents

Start deciding circuit of network control device

Info

Publication number
JPS56157166A
JPS56157166A JP6092780A JP6092780A JPS56157166A JP S56157166 A JPS56157166 A JP S56157166A JP 6092780 A JP6092780 A JP 6092780A JP 6092780 A JP6092780 A JP 6092780A JP S56157166 A JPS56157166 A JP S56157166A
Authority
JP
Japan
Prior art keywords
circuit
power source
voltage
control device
call signal
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
JP6092780A
Other languages
Japanese (ja)
Other versions
JPS6211830B2 (en
Inventor
Kazuhiko Shirai
Ryoji Yoshihara
Masanori Nakazawa
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
Nippon Telegraph and Telephone Corp
Original Assignee
NEC Corp
Nippon Telegraph and Telephone 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 Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP6092780A priority Critical patent/JPS56157166A/en
Publication of JPS56157166A publication Critical patent/JPS56157166A/en
Publication of JPS6211830B2 publication Critical patent/JPS6211830B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements

Landscapes

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

Abstract

PURPOSE:To decide the start of a network control device, by applying the power source to a call signal detecting circuit only when a circuit has reversed in its polarity and at the same time the voltage of the circuit is within a range of the 1st and 2nd prescribed voltages. CONSTITUTION:When the working voltage is supplied through the terminals 111 and 112, an overvoltage detecting part 11 and a voltage detecting part 12 work through a rectifier 17 to control a switch 14. Then a power source is applied to a detecting circuit 15 for data terminal call signal from a power source 13. Receiving a call signal from a center, the circuit 15 controls a connecting circuit 16 to connect the next data terminal 7 to the terminals 113 and 114. A start deciding circuit 10 consists of the rectifier 17, the part 11, the part 12, the power source 13 and the switch 14. And said parts 11 and 12 check whether the voltage is within a range of a prescribed level. Then a power source is applied to said circuit 15 only when the voltage is within a prescribed level.
JP6092780A 1980-05-08 1980-05-08 Start deciding circuit of network control device Granted JPS56157166A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6092780A JPS56157166A (en) 1980-05-08 1980-05-08 Start deciding circuit of network control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6092780A JPS56157166A (en) 1980-05-08 1980-05-08 Start deciding circuit of network control device

Publications (2)

Publication Number Publication Date
JPS56157166A true JPS56157166A (en) 1981-12-04
JPS6211830B2 JPS6211830B2 (en) 1987-03-14

Family

ID=13156502

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6092780A Granted JPS56157166A (en) 1980-05-08 1980-05-08 Start deciding circuit of network control device

Country Status (1)

Country Link
JP (1) JPS56157166A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5797762A (en) * 1980-12-11 1982-06-17 Nippon Telegr & Teleph Corp <Ntt> Analogue switch circuit
JPS60224366A (en) * 1984-04-23 1985-11-08 Nec Corp Testing device of network controlling device
JPS60250750A (en) * 1984-05-28 1985-12-11 Tamura Electric Works Ltd Functional telephone set
JPH03162060A (en) * 1989-11-21 1991-07-12 Tokyo Gas Co Ltd Network controller

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5797762A (en) * 1980-12-11 1982-06-17 Nippon Telegr & Teleph Corp <Ntt> Analogue switch circuit
JPS6214149B2 (en) * 1980-12-11 1987-03-31 Nippon Denshin Denwa Kk
JPS60224366A (en) * 1984-04-23 1985-11-08 Nec Corp Testing device of network controlling device
JPH0320947B2 (en) * 1984-04-23 1991-03-20 Nippon Electric Co
JPS60250750A (en) * 1984-05-28 1985-12-11 Tamura Electric Works Ltd Functional telephone set
JPH0262069B2 (en) * 1984-05-28 1990-12-21 Tamura Electric Works Ltd
JPH03162060A (en) * 1989-11-21 1991-07-12 Tokyo Gas Co Ltd Network controller

Also Published As

Publication number Publication date
JPS6211830B2 (en) 1987-03-14

Similar Documents

Publication Publication Date Title
EP0093544B1 (en) Improvements in and relating to electrostatic precipitators
JPS56157166A (en) Start deciding circuit of network control device
JPS56157168A (en) Start deciding circuit of network control device
JPS57211421A (en) Wire cut discharge machining power source equipment
EP0084259A3 (en) Sample &amp; hold circuit
JPS5537640A (en) Overvoltage preventive circuit of multi-power supply
JPH054362Y2 (en)
SU902173A1 (en) Ac-to-dc voltage converter
JPS5797762A (en) Analogue switch circuit
KR850002668Y1 (en) Power switch control circuit
JPS5723124A (en) Data processor
JPS55138963A (en) Network control device
KR930007931Y1 (en) Power supply system in telephone
JPS57115065A (en) Terminal equipment for optical communication
SU926730A1 (en) Electromagnet control device
JPS55124354A (en) Terminal connection system
JPS52101907A (en) Shunt type current switching scanning method
JPS5725761A (en) Switching circuit for core contrast of telephone circuit
GB1469103A (en) Circuit arrangements in telephone apparatus
JPS57178470A (en) Terminal feeding system
JPS5713971A (en) Rectifying circuit
JPS5690668A (en) Traffic simulator
JPS6481439A (en) Telephone set
JPS5739651A (en) Start/stop signal generating circuit in transfer telephone
JPS6467025A (en) Level conversion circuit