JPS5416914A - Misearth detection system for subscriber line - Google Patents

Misearth detection system for subscriber line

Info

Publication number
JPS5416914A
JPS5416914A JP8098477A JP8098477A JPS5416914A JP S5416914 A JPS5416914 A JP S5416914A JP 8098477 A JP8098477 A JP 8098477A JP 8098477 A JP8098477 A JP 8098477A JP S5416914 A JPS5416914 A JP S5416914A
Authority
JP
Japan
Prior art keywords
misearth
detection system
subscriber line
trunk
forcedly
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
JP8098477A
Other languages
Japanese (ja)
Inventor
Satoshi Takemori
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 JP8098477A priority Critical patent/JPS5416914A/en
Publication of JPS5416914A publication Critical patent/JPS5416914A/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)
  • Meter Arrangements (AREA)

Abstract

PURPOSE:To detect the misearth when the calling subscriber is connected to the trunk and then to prevent the mis-charging by cutting off the trunk forcedly.
JP8098477A 1977-07-08 1977-07-08 Misearth detection system for subscriber line Pending JPS5416914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8098477A JPS5416914A (en) 1977-07-08 1977-07-08 Misearth detection system for subscriber line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8098477A JPS5416914A (en) 1977-07-08 1977-07-08 Misearth detection system for subscriber line

Publications (1)

Publication Number Publication Date
JPS5416914A true JPS5416914A (en) 1979-02-07

Family

ID=13733755

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8098477A Pending JPS5416914A (en) 1977-07-08 1977-07-08 Misearth detection system for subscriber line

Country Status (1)

Country Link
JP (1) JPS5416914A (en)

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