JPS57141156A - Monitoring system for data transmission system - Google Patents

Monitoring system for data transmission system

Info

Publication number
JPS57141156A
JPS57141156A JP56026549A JP2654981A JPS57141156A JP S57141156 A JPS57141156 A JP S57141156A JP 56026549 A JP56026549 A JP 56026549A JP 2654981 A JP2654981 A JP 2654981A JP S57141156 A JPS57141156 A JP S57141156A
Authority
JP
Japan
Prior art keywords
transmitter
receiver
signal
nack
stand
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
JP56026549A
Other languages
Japanese (ja)
Other versions
JPS632385B2 (en
Inventor
Hiroshi Nakamura
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.)
Fuji Facom Corp
Original Assignee
Fuji Facom 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 Fuji Facom Corp filed Critical Fuji Facom Corp
Priority to JP56026549A priority Critical patent/JPS57141156A/en
Publication of JPS57141156A publication Critical patent/JPS57141156A/en
Publication of JPS632385B2 publication Critical patent/JPS632385B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

PURPOSE:To facilitate the monitoring of the operation of the transmitter and rceiver of an in-use system by sending data, to which error transmission control characters are added, from the transmitter and receiver of a stand-by system to the transmitter and receiver of the in-use system and by discriminating returned answer data. CONSTITUTION:The error code generation part 9 of the transmitter and receiver 8 of a stand-by system generates error transmission control characters, and a telegraphic message containing data and the added characters is generated by a control part 10 and sent to the transmitter and receiver 1 of an in-use system through a transmission part 13 and circuit parts 15 and 7. This telegraphic message is inputted via a reception part 6 to a control part 3 and then discriminated by a discrimination part 2 to confirm that the received transmission control characters are erroneous, so that the control part 3 generates a negative acknowledge signal (NACK). This signal NACK enters the transmitter and receiver 8 of the stand-by system through a transmission part 5 and circuit parts 7 and 15 and also enters a control part 11 to be discriminated by a discrimination part 10. The transmitter and receiver 1 of the in-use system is normal when the signal NACK is returned, or abnormal when a signal other than the signal NACK is sent back.
JP56026549A 1981-02-25 1981-02-25 Monitoring system for data transmission system Granted JPS57141156A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56026549A JPS57141156A (en) 1981-02-25 1981-02-25 Monitoring system for data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56026549A JPS57141156A (en) 1981-02-25 1981-02-25 Monitoring system for data transmission system

Publications (2)

Publication Number Publication Date
JPS57141156A true JPS57141156A (en) 1982-09-01
JPS632385B2 JPS632385B2 (en) 1988-01-19

Family

ID=12196589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56026549A Granted JPS57141156A (en) 1981-02-25 1981-02-25 Monitoring system for data transmission system

Country Status (1)

Country Link
JP (1) JPS57141156A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61208330A (en) * 1985-03-13 1986-09-16 Mitsubishi Electric Corp Controller for redundant communication line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61208330A (en) * 1985-03-13 1986-09-16 Mitsubishi Electric Corp Controller for redundant communication line

Also Published As

Publication number Publication date
JPS632385B2 (en) 1988-01-19

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