JPS56169460A - Failure detector for code relay device - Google Patents

Failure detector for code relay device

Info

Publication number
JPS56169460A
JPS56169460A JP7358880A JP7358880A JPS56169460A JP S56169460 A JPS56169460 A JP S56169460A JP 7358880 A JP7358880 A JP 7358880A JP 7358880 A JP7358880 A JP 7358880A JP S56169460 A JPS56169460 A JP S56169460A
Authority
JP
Japan
Prior art keywords
circuit
low frequency
frequency component
retrieval
bit
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
JP7358880A
Other languages
Japanese (ja)
Inventor
Kazuhiro Hayashi
Hideo Wataya
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP7358880A priority Critical patent/JPS56169460A/en
Publication of JPS56169460A publication Critical patent/JPS56169460A/en
Pending 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
    • H04L1/24—Testing correct operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To increase the detecting accuracy of error rate, by supplying a retrieval code train identified and reproduced to an exclusive logical sum circit directly or via a delay circuit and detecting predetermined low frequency component from the output. CONSTITUTION:A retrieval pulse code in basic period n-bit recognized and reproduced at a relay device main body 13 is branched into two, and one is directly fed to one end of an exclusive logical sum circuit 17, and another is fed to another end of the circuit 17 through a delay circuit 18 making delay in the same n-bit as the basic period of n-bit of the retrieval code train. Further, the output of this circuit 17 is fed to a low frequency pickup circuit 19 to detect the low frequency component predetermined. For example, when A is switched in a specific period at the terminal station as the retrieval pulse code train, the repetitive frequency component is picked up and outputted to the low frequency pickup circuit 19, and if there is an error as shown in dotted lines in A, the reduction in the repetitive frequency component like C can be detected.
JP7358880A 1980-05-30 1980-05-30 Failure detector for code relay device Pending JPS56169460A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7358880A JPS56169460A (en) 1980-05-30 1980-05-30 Failure detector for code relay device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7358880A JPS56169460A (en) 1980-05-30 1980-05-30 Failure detector for code relay device

Publications (1)

Publication Number Publication Date
JPS56169460A true JPS56169460A (en) 1981-12-26

Family

ID=13522614

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7358880A Pending JPS56169460A (en) 1980-05-30 1980-05-30 Failure detector for code relay device

Country Status (1)

Country Link
JP (1) JPS56169460A (en)

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