JPS6237571B2 - - Google Patents

Info

Publication number
JPS6237571B2
JPS6237571B2 JP20797581A JP20797581A JPS6237571B2 JP S6237571 B2 JPS6237571 B2 JP S6237571B2 JP 20797581 A JP20797581 A JP 20797581A JP 20797581 A JP20797581 A JP 20797581A JP S6237571 B2 JPS6237571 B2 JP S6237571B2
Authority
JP
Japan
Prior art keywords
relay
signal transmission
contact
loop
transfer
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.)
Expired
Application number
JP20797581A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58111442A (ja
Inventor
Tetsumasa Ooyama
Takao Gotoda
Akihiko Takada
Hiroyuki Noguchi
Masaharu Shimada
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
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu 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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP56207975A priority Critical patent/JPS58111442A/ja
Publication of JPS58111442A publication Critical patent/JPS58111442A/ja
Publication of JPS6237571B2 publication Critical patent/JPS6237571B2/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
    • H04L1/24—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • H04M3/301—Circuit arrangements at the subscriber's side of the line

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
JP56207975A 1981-12-24 1981-12-24 信号伝送路における折返しル−プ形成方法 Granted JPS58111442A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56207975A JPS58111442A (ja) 1981-12-24 1981-12-24 信号伝送路における折返しル−プ形成方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56207975A JPS58111442A (ja) 1981-12-24 1981-12-24 信号伝送路における折返しル−プ形成方法

Publications (2)

Publication Number Publication Date
JPS58111442A JPS58111442A (ja) 1983-07-02
JPS6237571B2 true JPS6237571B2 (enExample) 1987-08-13

Family

ID=16548599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56207975A Granted JPS58111442A (ja) 1981-12-24 1981-12-24 信号伝送路における折返しル−プ形成方法

Country Status (1)

Country Link
JP (1) JPS58111442A (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02254049A (ja) * 1989-03-28 1990-10-12 Masaharu Morita ウオシャーノズルを取付けた車用ワイパー
JP2011061593A (ja) * 2009-09-11 2011-03-24 Fujitsu Ltd 伝送路測定装置、測定方法及びコンピュータプログラム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02254049A (ja) * 1989-03-28 1990-10-12 Masaharu Morita ウオシャーノズルを取付けた車用ワイパー
JP2011061593A (ja) * 2009-09-11 2011-03-24 Fujitsu Ltd 伝送路測定装置、測定方法及びコンピュータプログラム

Also Published As

Publication number Publication date
JPS58111442A (ja) 1983-07-02

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