JPS55150639A - Data transmission unit - Google Patents

Data transmission unit

Info

Publication number
JPS55150639A
JPS55150639A JP5859479A JP5859479A JPS55150639A JP S55150639 A JPS55150639 A JP S55150639A JP 5859479 A JP5859479 A JP 5859479A JP 5859479 A JP5859479 A JP 5859479A JP S55150639 A JPS55150639 A JP S55150639A
Authority
JP
Japan
Prior art keywords
terminal equipments
data transmission
transmission unit
devices
transmission line
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
JP5859479A
Other languages
Japanese (ja)
Inventor
Hiroshi Fukuda
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
Original Assignee
Toshiba 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, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP5859479A priority Critical patent/JPS55150639A/en
Publication of JPS55150639A publication Critical patent/JPS55150639A/en
Pending 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
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To prevent the influence upon the transmission line at a disconnection time of I/O devices and at a switching time of the power source, by separating electrically the input side and the output side of the interface unit which connects the transmission line and I/O devices. CONSTITUTION:Photocouplers 6 and 7 are used in interface units 4 and 5, and input ends 8 and 10 and output ends 9 and 11 are separated electrically from each other. Consequently, even if any of terminal equipments 2 is faulty or is disconnected from the system, signals transmitted to other terminal equipments 2 can be prevented from being dislocated due to break of impedance matching because transmmision line 3 is separated electrically from terminal equipments 2 by interface unit 5.
JP5859479A 1979-05-15 1979-05-15 Data transmission unit Pending JPS55150639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5859479A JPS55150639A (en) 1979-05-15 1979-05-15 Data transmission unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5859479A JPS55150639A (en) 1979-05-15 1979-05-15 Data transmission unit

Publications (1)

Publication Number Publication Date
JPS55150639A true JPS55150639A (en) 1980-11-22

Family

ID=13088808

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5859479A Pending JPS55150639A (en) 1979-05-15 1979-05-15 Data transmission unit

Country Status (1)

Country Link
JP (1) JPS55150639A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4596048A (en) * 1983-04-04 1986-06-17 General Electric Company Optically isolated contention bus
JPH01174143A (en) * 1987-12-28 1989-07-10 Toshiba Corp Network terminator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4596048A (en) * 1983-04-04 1986-06-17 General Electric Company Optically isolated contention bus
JPH01174143A (en) * 1987-12-28 1989-07-10 Toshiba Corp Network terminator

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