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JPS52104005A - Circuit changeover device which possesses roopback function - Google Patents

Circuit changeover device which possesses roopback function

Info

Publication number
JPS52104005A
JPS52104005A JP2091576A JP2091576A JPS52104005A JP S52104005 A JPS52104005 A JP S52104005A JP 2091576 A JP2091576 A JP 2091576A JP 2091576 A JP2091576 A JP 2091576A JP S52104005 A JPS52104005 A JP S52104005A
Authority
JP
Japan
Prior art keywords
roopback
possesses
function
changeover device
circuit changeover
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
JP2091576A
Other languages
Japanese (ja)
Inventor
Nobuo Shibukawa
Yasuo Doi
Mikio Sato
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP2091576A priority Critical patent/JPS52104005A/en
Publication of JPS52104005A publication Critical patent/JPS52104005A/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)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Hardware Redundancy (AREA)
  • Test And Diagnosis Of Digital Computers (AREA)
  • Computer And Data Communications (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE:To simplify an interactive test by means of using roopback connecting device in a data communication system.
JP2091576A 1976-02-27 1976-02-27 Circuit changeover device which possesses roopback function Pending JPS52104005A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2091576A JPS52104005A (en) 1976-02-27 1976-02-27 Circuit changeover device which possesses roopback function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2091576A JPS52104005A (en) 1976-02-27 1976-02-27 Circuit changeover device which possesses roopback function

Publications (1)

Publication Number Publication Date
JPS52104005A true JPS52104005A (en) 1977-09-01

Family

ID=12040509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2091576A Pending JPS52104005A (en) 1976-02-27 1976-02-27 Circuit changeover device which possesses roopback function

Country Status (1)

Country Link
JP (1) JPS52104005A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02207643A (en) * 1989-02-07 1990-08-17 Omron Tateisi Electron Co Communication control equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02207643A (en) * 1989-02-07 1990-08-17 Omron Tateisi Electron Co Communication control equipment

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