JPS54148312A - Loop-back remote control system - Google Patents

Loop-back remote control system

Info

Publication number
JPS54148312A
JPS54148312A JP5615478A JP5615478A JPS54148312A JP S54148312 A JPS54148312 A JP S54148312A JP 5615478 A JP5615478 A JP 5615478A JP 5615478 A JP5615478 A JP 5615478A JP S54148312 A JPS54148312 A JP S54148312A
Authority
JP
Japan
Prior art keywords
loop
code system
signal
circuit
decision
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
JP5615478A
Other languages
Japanese (ja)
Inventor
Kiyotaka Nishi
Shinichi Koike
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 JP5615478A priority Critical patent/JPS54148312A/en
Publication of JPS54148312A publication Critical patent/JPS54148312A/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
    • H04L1/242—Testing correct operation by comparing a transmitted test signal with a locally generated replica
    • H04L1/243—Testing correct operation by comparing a transmitted test signal with a locally generated replica at the transmitter, using a loop-back

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE:To secure an early detection of the fault caused by the quick partition of the loop deciding through the decision circuit whether the signal of the normal code system or the code of the loop-back code system and then forming the loop- back circuit of an optional repeating section based on the result of the above decision. CONSTITUTION:When the loop-back is carried out between the transmission devices which are distant away from each other, bipolar signal transmission circuit 12-4 converts the data code system of the normal transmission time into the code system for loop-back for transmission. With reception 12-6 of the transmitted signals, decision circuit 12-5 decides whether the signal is the signal of the normal code system or the signal of the loop-back code system. Thus, the loop-back circuit is formed by the result of the decision for an optional repeating section. As a result, an early detection is possible for the falut caused by the accelerated partitioning of the loop.
JP5615478A 1978-05-13 1978-05-13 Loop-back remote control system Pending JPS54148312A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5615478A JPS54148312A (en) 1978-05-13 1978-05-13 Loop-back remote control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5615478A JPS54148312A (en) 1978-05-13 1978-05-13 Loop-back remote control system

Publications (1)

Publication Number Publication Date
JPS54148312A true JPS54148312A (en) 1979-11-20

Family

ID=13019168

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5615478A Pending JPS54148312A (en) 1978-05-13 1978-05-13 Loop-back remote control system

Country Status (1)

Country Link
JP (1) JPS54148312A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5994950A (en) * 1982-11-23 1984-05-31 Japanese National Railways<Jnr> Section monitoring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5994950A (en) * 1982-11-23 1984-05-31 Japanese National Railways<Jnr> Section monitoring device

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