JPS5466005A - Detection system for fault of called subscribersigma circuit - Google Patents

Detection system for fault of called subscribersigma circuit

Info

Publication number
JPS5466005A
JPS5466005A JP13276177A JP13276177A JPS5466005A JP S5466005 A JPS5466005 A JP S5466005A JP 13276177 A JP13276177 A JP 13276177A JP 13276177 A JP13276177 A JP 13276177A JP S5466005 A JPS5466005 A JP S5466005A
Authority
JP
Japan
Prior art keywords
fault
ringing
circuit
called
subscriber
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
JP13276177A
Other languages
Japanese (ja)
Inventor
Haruo Yanagi
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
Original Assignee
NEC 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 Electric Co Ltd filed Critical NEC Corp
Priority to JP13276177A priority Critical patent/JPS5466005A/en
Publication of JPS5466005A publication Critical patent/JPS5466005A/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 prevent the ineffective use of a ringing system by preventing the latency of the fault of a called subscriber's circuit, by automatically checking the fault during the transmission of a ringing and by printing out and storing the details of the fault when detecting it. CONSTITUTION:Ringing transmitter RGT is provided with the overcurrent detecting method and undercurrent detecting method of a called-subscriber's circuit and at the time when ringing transmitter RGT sends out a ringing, the fault of the called- subscriber's circuit is checked automatically. Then, when the trouble is detected, a fault state signal is transmitted from transmitter RGT to the control-system unit, which controls printer TTY to print out its details and also control memory unit MEM. Consequently, the latency of a circuit fault is prevented and an incoming to the subscriber in trouble is inhibited, so that the ineffective use of the ringing transmitter, etc., can be prevented.
JP13276177A 1977-11-05 1977-11-05 Detection system for fault of called subscribersigma circuit Pending JPS5466005A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13276177A JPS5466005A (en) 1977-11-05 1977-11-05 Detection system for fault of called subscribersigma circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13276177A JPS5466005A (en) 1977-11-05 1977-11-05 Detection system for fault of called subscribersigma circuit

Publications (1)

Publication Number Publication Date
JPS5466005A true JPS5466005A (en) 1979-05-28

Family

ID=15088930

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13276177A Pending JPS5466005A (en) 1977-11-05 1977-11-05 Detection system for fault of called subscribersigma circuit

Country Status (1)

Country Link
JP (1) JPS5466005A (en)

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