JPS57199357A - Data transmission controller - Google Patents

Data transmission controller

Info

Publication number
JPS57199357A
JPS57199357A JP56085178A JP8517881A JPS57199357A JP S57199357 A JPS57199357 A JP S57199357A JP 56085178 A JP56085178 A JP 56085178A JP 8517881 A JP8517881 A JP 8517881A JP S57199357 A JPS57199357 A JP S57199357A
Authority
JP
Japan
Prior art keywords
line
emergency information
information
transmission
controlling parts
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
JP56085178A
Other languages
Japanese (ja)
Inventor
Masami Tamura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56085178A priority Critical patent/JPS57199357A/en
Publication of JPS57199357A publication Critical patent/JPS57199357A/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]
    • H04L12/42—Loop networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)

Abstract

PURPOSE:To separate and transmit information to transmit emergency information quickly and improve the response, by giving the dual constitution consisting of a general information line and an emergency information line to the transmission line and providing circuit controlling parts for general and emergency information transmission lines independently of each other. CONSTITUTION:Plural data transmission devices 23a-23c are connected by a general information transmission line 21 and an emergency information transmission line 22, and CPUs 3a-3c are connected to devices 23a-23c, respectively. Transmission lines 21 and 22 are connected to repeaters 31a and 31b of devices 23a-23c, and emergency information is applied to line controlling parts 32a and 32b through repeaters 31a and 31b and is stored in data buffers 34a and 34b through line controlling parts 32a and 32b. A CPU36 (CPUs 3a-3c) is interrupted by an interface 35 to take in and process emergency information in the CPU36. In case of the transmission of emergency information, information is stored in buffers 34a and 34b temporarily and is transmitted to the transmission line 22 by the control of controlling parts 32a and 32b.
JP56085178A 1981-06-02 1981-06-02 Data transmission controller Pending JPS57199357A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56085178A JPS57199357A (en) 1981-06-02 1981-06-02 Data transmission controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56085178A JPS57199357A (en) 1981-06-02 1981-06-02 Data transmission controller

Publications (1)

Publication Number Publication Date
JPS57199357A true JPS57199357A (en) 1982-12-07

Family

ID=13851402

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56085178A Pending JPS57199357A (en) 1981-06-02 1981-06-02 Data transmission controller

Country Status (1)

Country Link
JP (1) JPS57199357A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04233134A (en) * 1990-12-16 1992-08-21 Samsung Electron Devices Co Ltd Clip for coupling inner shield and frame

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52109308A (en) * 1976-03-10 1977-09-13 Toshiba Corp Information transmission device
JPS52109307A (en) * 1976-03-10 1977-09-13 Toshiba Corp Information transmission device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52109308A (en) * 1976-03-10 1977-09-13 Toshiba Corp Information transmission device
JPS52109307A (en) * 1976-03-10 1977-09-13 Toshiba Corp Information transmission device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04233134A (en) * 1990-12-16 1992-08-21 Samsung Electron Devices Co Ltd Clip for coupling inner shield and frame

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