JPS56157156A - Control system - Google Patents

Control system

Info

Publication number
JPS56157156A
JPS56157156A JP6073280A JP6073280A JPS56157156A JP S56157156 A JPS56157156 A JP S56157156A JP 6073280 A JP6073280 A JP 6073280A JP 6073280 A JP6073280 A JP 6073280A JP S56157156 A JPS56157156 A JP S56157156A
Authority
JP
Japan
Prior art keywords
trm30
data transmission
data
terminal device
transmission request
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
JP6073280A
Other languages
Japanese (ja)
Inventor
Toshie Takatake
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 JP6073280A priority Critical patent/JPS56157156A/en
Publication of JPS56157156A publication Critical patent/JPS56157156A/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

Landscapes

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

Abstract

PURPOSE:To reduce the queuing time for the data transmitted from a terminal device, by providing a data transmission request line and a data transmission permission line between a scanner and each terminal device and using a special control sequence for these lines. CONSTITUTION:A scanning circuit SCNC16 detects the data transmission request signal sent from e.g. a terminal device TRM30 and immediately stops the scanning action temporarily to actuate a transmission/reception level converting circuit 18'. In such active mode, the data communication lines 72 and 73 of the TRM30 that accepted a transmission request are connected logically to a transmission procedure control circuit LSI13 via a bus 17. At the same time, a state is set under which a data transmission permission signal can be transmitted to a data transmission permission line ENB71. As a result, the circuits 72 and 73 of the TRM30 are connected to the data communication circuits of the upper devices to set up an interface between an upper device and the TRM30.
JP6073280A 1980-05-09 1980-05-09 Control system Pending JPS56157156A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6073280A JPS56157156A (en) 1980-05-09 1980-05-09 Control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6073280A JPS56157156A (en) 1980-05-09 1980-05-09 Control system

Publications (1)

Publication Number Publication Date
JPS56157156A true JPS56157156A (en) 1981-12-04

Family

ID=13150738

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6073280A Pending JPS56157156A (en) 1980-05-09 1980-05-09 Control system

Country Status (1)

Country Link
JP (1) JPS56157156A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0469461B2 (en) * 1982-03-05 1992-11-06 Ei Teii Ando Teii Tekunorojiizu Inc

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5024041A (en) * 1973-07-04 1975-03-14

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5024041A (en) * 1973-07-04 1975-03-14

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0469461B2 (en) * 1982-03-05 1992-11-06 Ei Teii Ando Teii Tekunorojiizu Inc

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