JPS5488009A - Fault isolation/detection system - Google Patents

Fault isolation/detection system

Info

Publication number
JPS5488009A
JPS5488009A JP15582977A JP15582977A JPS5488009A JP S5488009 A JPS5488009 A JP S5488009A JP 15582977 A JP15582977 A JP 15582977A JP 15582977 A JP15582977 A JP 15582977A JP S5488009 A JPS5488009 A JP S5488009A
Authority
JP
Japan
Prior art keywords
relay
current
subscriber
fault
circuit
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
JP15582977A
Other languages
Japanese (ja)
Other versions
JPS5923506B2 (en
Inventor
Yuichi Chiba
Senji Kuroki
Yoshiaki Matsuura
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
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15582977A priority Critical patent/JPS5923506B2/en
Publication of JPS5488009A publication Critical patent/JPS5488009A/en
Publication of JPS5923506B2 publication Critical patent/JPS5923506B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/20—Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To carry out the isolation and detection of the fault for the subscriber line and the network by forming the subscriber circuit and the current division circuit to the trunk in the telephone exchange system. CONSTITUTION:Subscriber line RS is connected with outgoing register trunk ORT. When the defective connection is decided as the result of the channel continuity test, contact co of the cut-off relay is made. And current Ib is flown in division to relay LR of the subscriber circuit. In this case, current Ib is larger than the working current of relay LR with the subscriber put under the off-hook state, and thus the fault of network NW is detected. In case, current Ia flowing to relay A is smaller than the working current of relay A with the subscriber put under the off-hook state, the fault of the subscriber line can be detected.
JP15582977A 1977-12-24 1977-12-24 Fault isolation detection method Expired JPS5923506B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15582977A JPS5923506B2 (en) 1977-12-24 1977-12-24 Fault isolation detection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15582977A JPS5923506B2 (en) 1977-12-24 1977-12-24 Fault isolation detection method

Publications (2)

Publication Number Publication Date
JPS5488009A true JPS5488009A (en) 1979-07-12
JPS5923506B2 JPS5923506B2 (en) 1984-06-02

Family

ID=15614395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15582977A Expired JPS5923506B2 (en) 1977-12-24 1977-12-24 Fault isolation detection method

Country Status (1)

Country Link
JP (1) JPS5923506B2 (en)

Also Published As

Publication number Publication date
JPS5923506B2 (en) 1984-06-02

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