JPS5967755A - 中継系の保守試験方式 - Google Patents

中継系の保守試験方式

Info

Publication number
JPS5967755A
JPS5967755A JP57177528A JP17752882A JPS5967755A JP S5967755 A JPS5967755 A JP S5967755A JP 57177528 A JP57177528 A JP 57177528A JP 17752882 A JP17752882 A JP 17752882A JP S5967755 A JPS5967755 A JP S5967755A
Authority
JP
Japan
Prior art keywords
repeater
center
line
specific code
direct current
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
JP57177528A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6360943B2 (enExample
Inventor
Masaru Yamaguchi
勝 山口
Masaharu Shimada
正治 島田
Kazuhiro Hayashi
一博 林
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
Nippon Telegraph and Telephone Corp
Original Assignee
NEC Corp
Nippon Telegraph and Telephone 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 Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP57177528A priority Critical patent/JPS5967755A/ja
Publication of JPS5967755A publication Critical patent/JPS5967755A/ja
Publication of JPS6360943B2 publication Critical patent/JPS6360943B2/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
JP57177528A 1982-10-12 1982-10-12 中継系の保守試験方式 Granted JPS5967755A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57177528A JPS5967755A (ja) 1982-10-12 1982-10-12 中継系の保守試験方式

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57177528A JPS5967755A (ja) 1982-10-12 1982-10-12 中継系の保守試験方式

Publications (2)

Publication Number Publication Date
JPS5967755A true JPS5967755A (ja) 1984-04-17
JPS6360943B2 JPS6360943B2 (enExample) 1988-11-25

Family

ID=16032496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57177528A Granted JPS5967755A (ja) 1982-10-12 1982-10-12 中継系の保守試験方式

Country Status (1)

Country Link
JP (1) JPS5967755A (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60180235A (ja) * 1984-02-27 1985-09-14 Nec Corp 中継伝送路監視方式
JPS60235545A (ja) * 1984-05-08 1985-11-22 Nec Corp Ｐｃｍ伝送システムにおける信号折返し方式

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020150539A1 (en) 1989-12-22 2002-10-17 Unger Evan C. Ultrasound imaging and treatment
US5205290A (en) 1991-04-05 1993-04-27 Unger Evan C Low density microspheres and their use as contrast agents for computed tomography
US6521211B1 (en) 1995-06-07 2003-02-18 Bristol-Myers Squibb Medical Imaging, Inc. Methods of imaging and treatment with targeted compositions
US20010003580A1 (en) 1998-01-14 2001-06-14 Poh K. Hui Preparation of a lipid blend and a phospholipid suspension containing the lipid blend

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60180235A (ja) * 1984-02-27 1985-09-14 Nec Corp 中継伝送路監視方式
JPS60235545A (ja) * 1984-05-08 1985-11-22 Nec Corp Ｐｃｍ伝送システムにおける信号折返し方式

Also Published As

Publication number Publication date
JPS6360943B2 (enExample) 1988-11-25

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