JPS5789338A - Monitor device for intermittent disconnection of communication cable line - Google Patents

Monitor device for intermittent disconnection of communication cable line

Info

Publication number
JPS5789338A
JPS5789338A JP16523880A JP16523880A JPS5789338A JP S5789338 A JPS5789338 A JP S5789338A JP 16523880 A JP16523880 A JP 16523880A JP 16523880 A JP16523880 A JP 16523880A JP S5789338 A JPS5789338 A JP S5789338A
Authority
JP
Japan
Prior art keywords
output
signal
earth
cable lines
cores
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
JP16523880A
Other languages
Japanese (ja)
Other versions
JPS6132854B2 (en
Inventor
Susumu Hasegawa
Michihiko Kusunoki
Ryosuke Kaizu
Shoichi Nakanishi
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP16523880A priority Critical patent/JPS5789338A/en
Publication of JPS5789338A publication Critical patent/JPS5789338A/en
Publication of JPS6132854B2 publication Critical patent/JPS6132854B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing

Abstract

PURPOSE:To detect only a pure intermittent disconnection caused by the imperfect contact of the connection part and, etc. of a cable line to be measured, by suppressing the output signal of an unbalanced voltage detector when the voltage between cores and the earth of a certain level or more is detected simultaneously in two cable lines to be measured. CONSTITUTION:A signal generator 7 is provided which transmits a signal across the earth and cable lines L1 and L2 to be measured; and when it is detected by an output signal control part 9 that the voltage between cores and the earth of a certain level or more exists in cable lines L1 and L2 simultaneously, the output signal of an unbalanced voltage detector 8 is suppressed. That is, when the simultaneous existence of the voltage between earth and cores of the cartain level or more in cable lines L1 and L2 is detected by comparing circuits 10-13 and AND circuits 16 and 17, an output suppressing signal is outputted from an output suppressing signal generating circuit 19 to suppress the output of the unbalanced voltage detector 8 by an output controlling circuit 20.
JP16523880A 1980-11-26 1980-11-26 Monitor device for intermittent disconnection of communication cable line Granted JPS5789338A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16523880A JPS5789338A (en) 1980-11-26 1980-11-26 Monitor device for intermittent disconnection of communication cable line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16523880A JPS5789338A (en) 1980-11-26 1980-11-26 Monitor device for intermittent disconnection of communication cable line

Publications (2)

Publication Number Publication Date
JPS5789338A true JPS5789338A (en) 1982-06-03
JPS6132854B2 JPS6132854B2 (en) 1986-07-30

Family

ID=15808482

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16523880A Granted JPS5789338A (en) 1980-11-26 1980-11-26 Monitor device for intermittent disconnection of communication cable line

Country Status (1)

Country Link
JP (1) JPS5789338A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02132163U (en) * 1989-04-10 1990-11-02

Also Published As

Publication number Publication date
JPS6132854B2 (en) 1986-07-30

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