JPS56149143A - Circuit quality monitor system - Google Patents

Circuit quality monitor system

Info

Publication number
JPS56149143A
JPS56149143A JP5267080A JP5267080A JPS56149143A JP S56149143 A JPS56149143 A JP S56149143A JP 5267080 A JP5267080 A JP 5267080A JP 5267080 A JP5267080 A JP 5267080A JP S56149143 A JPS56149143 A JP S56149143A
Authority
JP
Japan
Prior art keywords
circuit
measuring
switching equipment
pattern
communication
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
JP5267080A
Other languages
Japanese (ja)
Inventor
Takashi Akao
Tadashi Yatani
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 JP5267080A priority Critical patent/JPS56149143A/en
Publication of JPS56149143A publication Critical patent/JPS56149143A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/50—Testing arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

PURPOSE:To maintain transmission quality without spoiling communication service by sending a measuring signal from a switching equipment to a communication circuit in a radio communication state, by returning the measuring signal from the communication circuit to the switching equipment via a returning circuit on the communication circuit, and by receiving it by a receiving means. CONSTITUTION:To subscriber circuit terminator 2 connected to terminal equipment 1, data switching equipment 4 is connected via subscriber circuit 3 and to this switching equipment 4, error rate measuring instrument 5 is also connected to constitute data switching network N. This measuring instrument 5 is provided with measuring pattern generating and sending circuit 51, measuring pattern receiving circuit 52, collating circuit 53, and processing part 54 to monitor the communication state of circuit 3 at any time by detection part 41 provided to switching equipment 4. Then, a signal closing returning circuit 21 is sent from measuring instrument 5 to terminator 2 via circuit 3 and a measuring pattern is sent from circuit 51; and the pattern returned by circuit 21 is received by circuit 52 and then collated by circuit 53 with the sent pattern to maintain the excellent transmission quality of circuit 3.
JP5267080A 1980-04-21 1980-04-21 Circuit quality monitor system Pending JPS56149143A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5267080A JPS56149143A (en) 1980-04-21 1980-04-21 Circuit quality monitor system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5267080A JPS56149143A (en) 1980-04-21 1980-04-21 Circuit quality monitor system

Publications (1)

Publication Number Publication Date
JPS56149143A true JPS56149143A (en) 1981-11-18

Family

ID=12921299

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5267080A Pending JPS56149143A (en) 1980-04-21 1980-04-21 Circuit quality monitor system

Country Status (1)

Country Link
JP (1) JPS56149143A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8079454B2 (en) 2008-10-08 2011-12-20 Toyota Jidosha Kabushiki Kaisha Friction engagement apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5255405A (en) * 1975-10-31 1977-05-06 Fujitsu Ltd Pilot test system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5255405A (en) * 1975-10-31 1977-05-06 Fujitsu Ltd Pilot test system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8079454B2 (en) 2008-10-08 2011-12-20 Toyota Jidosha Kabushiki Kaisha Friction engagement apparatus

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