JPS5436110A - Failure detection system of subscribing circuit - Google Patents

Failure detection system of subscribing circuit

Info

Publication number
JPS5436110A
JPS5436110A JP10167177A JP10167177A JPS5436110A JP S5436110 A JPS5436110 A JP S5436110A JP 10167177 A JP10167177 A JP 10167177A JP 10167177 A JP10167177 A JP 10167177A JP S5436110 A JPS5436110 A JP S5436110A
Authority
JP
Japan
Prior art keywords
subscribing
circuit
detection system
failure detection
relays
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
JP10167177A
Other languages
Japanese (ja)
Inventor
Takeji Aizawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10167177A priority Critical patent/JPS5436110A/en
Publication of JPS5436110A publication Critical patent/JPS5436110A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To enable to detect and repair failures, by periodically and concentrating checking line relays (L) and cut off relays (C) for the entire subscriber circuits of an exchanger.
JP10167177A 1977-08-26 1977-08-26 Failure detection system of subscribing circuit Pending JPS5436110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10167177A JPS5436110A (en) 1977-08-26 1977-08-26 Failure detection system of subscribing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10167177A JPS5436110A (en) 1977-08-26 1977-08-26 Failure detection system of subscribing circuit

Publications (1)

Publication Number Publication Date
JPS5436110A true JPS5436110A (en) 1979-03-16

Family

ID=14306821

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10167177A Pending JPS5436110A (en) 1977-08-26 1977-08-26 Failure detection system of subscribing circuit

Country Status (1)

Country Link
JP (1) JPS5436110A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57149885A (en) * 1981-03-13 1982-09-16 Nippon Chemical Ind Fused phosphate pellets and manufacture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57149885A (en) * 1981-03-13 1982-09-16 Nippon Chemical Ind Fused phosphate pellets and manufacture
JPS6131078B2 (en) * 1981-03-13 1986-07-17 Nippon Chemical Ind

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