JPS55138948A - Circuit control system - Google Patents

Circuit control system

Info

Publication number
JPS55138948A
JPS55138948A JP4773779A JP4773779A JPS55138948A JP S55138948 A JPS55138948 A JP S55138948A JP 4773779 A JP4773779 A JP 4773779A JP 4773779 A JP4773779 A JP 4773779A JP S55138948 A JPS55138948 A JP S55138948A
Authority
JP
Japan
Prior art keywords
circuit
data
channel
loop
control system
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
JP4773779A
Other languages
Japanese (ja)
Inventor
Tsugio Sugawara
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 JP4773779A priority Critical patent/JPS55138948A/en
Publication of JPS55138948A publication Critical patent/JPS55138948A/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
    • H04L12/423—Loop networks with centralised control, e.g. polling

Landscapes

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

Abstract

PURPOSE:To realize a circuit control system which raises the initial cost little and is rich in extensibility, by mutually connecting the circuit scanning part and the circuit corresponding part in a loop. CONSTITUTION:The circuit scanning part 50 in the circuit control unit (CCU) 5 and the circuit corresponding parts 61-6n in the line unit (LUT) 6 are connected by a loop network 7. In the loop 7, a data goes round in one direction in the format of byte as time sharing on the data channel which is made to correspond to each circuit corresponding part. Each circuit corresponding part 61-6n consists of a receiver 611, a driver 612 and a line adaptor 613, receivers a data from the channel corresponding to itself, and transmits a transmission data to this channel. The circuit scanning part 50 receives a data from the channel corresponding to the object circuit corresponding part, and transmits a data to this channel.
JP4773779A 1979-04-18 1979-04-18 Circuit control system Pending JPS55138948A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4773779A JPS55138948A (en) 1979-04-18 1979-04-18 Circuit control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4773779A JPS55138948A (en) 1979-04-18 1979-04-18 Circuit control system

Publications (1)

Publication Number Publication Date
JPS55138948A true JPS55138948A (en) 1980-10-30

Family

ID=12783649

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4773779A Pending JPS55138948A (en) 1979-04-18 1979-04-18 Circuit control system

Country Status (1)

Country Link
JP (1) JPS55138948A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01112850A (en) * 1987-10-26 1989-05-01 Hitachi Ltd Pseudo loop transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01112850A (en) * 1987-10-26 1989-05-01 Hitachi Ltd Pseudo loop transmission system

Similar Documents

Publication Publication Date Title
HK1030852A1 (en) Communication system and method for transmitting data of different types
WO1997018871A3 (en) I*doll
MY110481A (en) System for wireless transmitting and receiving a video
JPS56104561A (en) Data transmission system
JPS55138948A (en) Circuit control system
AU8307787A (en) A transmission system
JPS5624867A (en) Facsimile simultaneous transmission and reception system
FI843302A0 (en) TIDSSEKVENTIELLT TELEVISIONSOEVERFOERINGSSYSTEM, SAERSKILT FOER EN VIDEOAPPARAT.
JPS56157153A (en) Data repeating device
GB2323758B (en) Method and apparatus for transmitting data
JPS5279815A (en) Transmitting and receiving circuit
JPS5694851A (en) Control system of multi-point circuit
JPS5739646A (en) Interruption controlling system during communication
EP0238988A3 (en) Digital signal transmitting system
JPS52144201A (en) Data communication system
JPS57116454A (en) Signal transmission system
JPS6462966A (en) Facsimile multi-address device
JPS55151835A (en) Device for multiple address communication
JPS6482713A (en) Radio communication system
JPS5625848A (en) Frame synchronizing system
JPS57123750A (en) Signal transmitting and receiving device
JPS5650666A (en) Facsimile exchange system
JPS54156408A (en) Line correction unit
JPS5370711A (en) Picture image transmitting system
JPS536504A (en) Distribution system for facsimile signal