JPS54142902A - Communication system using polling emulator - Google Patents

Communication system using polling emulator

Info

Publication number
JPS54142902A
JPS54142902A JP4984078A JP4984078A JPS54142902A JP S54142902 A JPS54142902 A JP S54142902A JP 4984078 A JP4984078 A JP 4984078A JP 4984078 A JP4984078 A JP 4984078A JP S54142902 A JPS54142902 A JP S54142902A
Authority
JP
Japan
Prior art keywords
polling
emulator
emt
emc
comp
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
JP4984078A
Other languages
Japanese (ja)
Other versions
JPS5811146B2 (en
Inventor
Jiro Kashio
Yoshio Hirako
Takeshi Hyodo
Kunioki Kanashige
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
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone Corp
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, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP53049840A priority Critical patent/JPS5811146B2/en
Publication of JPS54142902A publication Critical patent/JPS54142902A/en
Publication of JPS5811146B2 publication Critical patent/JPS5811146B2/en
Expired 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
    • H04L12/403—Bus networks with centralised control, e.g. polling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

PURPOSE:To increase the degree of freedom for the circuit constitution by blocking either the designation signal or the answer signal by the 1st and 2nd polling emulators and applying the P/S (polling/selecting) system along with the private line between the central control unit and the terminal unit. CONSTITUTION:Central control unit COMP transmits at least 1st and 2nd polling signals and contains 1st polling emulator EMC combined to COMP, 2nd polling emulator EMT combined to EMC via the communication circuit, and terminal unit TB combined to EMT respectively. Here, COMP generates the designation signal which designates the terminal as well as the information to be sent to the terminal unit, and emulator EMC or EMT functions to block either the designation signal or the answer signal. Thus, the P/S system along with the private line are applied between COMP and TB via emulator EMC and EMT, encreasing the degree of freedom for the circuit constitution.
JP53049840A 1978-04-28 1978-04-28 Communication method using polling emulator Expired JPS5811146B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53049840A JPS5811146B2 (en) 1978-04-28 1978-04-28 Communication method using polling emulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53049840A JPS5811146B2 (en) 1978-04-28 1978-04-28 Communication method using polling emulator

Publications (2)

Publication Number Publication Date
JPS54142902A true JPS54142902A (en) 1979-11-07
JPS5811146B2 JPS5811146B2 (en) 1983-03-01

Family

ID=12842265

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53049840A Expired JPS5811146B2 (en) 1978-04-28 1978-04-28 Communication method using polling emulator

Country Status (1)

Country Link
JP (1) JPS5811146B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56115057A (en) * 1980-02-15 1981-09-10 Fujitsu Ltd Data communication system
JPS5767356A (en) * 1980-10-14 1982-04-23 Hitachi Ltd Communication control device
JPS594358A (en) * 1982-06-30 1984-01-11 Chino Works Ltd Data transmitter
JPS61244149A (en) * 1985-04-22 1986-10-30 Nec Corp Data transmission system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56115057A (en) * 1980-02-15 1981-09-10 Fujitsu Ltd Data communication system
JPS6239577B2 (en) * 1980-02-15 1987-08-24 Fujitsu Kk
JPS5767356A (en) * 1980-10-14 1982-04-23 Hitachi Ltd Communication control device
JPS6233785B2 (en) * 1980-10-14 1987-07-22 Hitachi Ltd
JPS594358A (en) * 1982-06-30 1984-01-11 Chino Works Ltd Data transmitter
JPH0230618B2 (en) * 1982-06-30 1990-07-09 Chino Corp
JPS61244149A (en) * 1985-04-22 1986-10-30 Nec Corp Data transmission system

Also Published As

Publication number Publication date
JPS5811146B2 (en) 1983-03-01

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