JPS52149007A - Circuit monitor system - Google Patents

Circuit monitor system

Info

Publication number
JPS52149007A
JPS52149007A JP6450376A JP6450376A JPS52149007A JP S52149007 A JPS52149007 A JP S52149007A JP 6450376 A JP6450376 A JP 6450376A JP 6450376 A JP6450376 A JP 6450376A JP S52149007 A JPS52149007 A JP S52149007A
Authority
JP
Japan
Prior art keywords
monitor system
circuit monitor
circuit
secure
monitor
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
JP6450376A
Other languages
Japanese (ja)
Inventor
Toyokazu Hashimoto
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 JP6450376A priority Critical patent/JPS52149007A/en
Publication of JPS52149007A publication Critical patent/JPS52149007A/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
    • H04M3/2209—Arrangements for supervision, monitoring or testing for lines also used for data transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To secure a monitor at the central side for the operational condition of the terminal unit at a distant place for the data communication system of polling system.
JP6450376A 1976-06-04 1976-06-04 Circuit monitor system Pending JPS52149007A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6450376A JPS52149007A (en) 1976-06-04 1976-06-04 Circuit monitor system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6450376A JPS52149007A (en) 1976-06-04 1976-06-04 Circuit monitor system

Publications (1)

Publication Number Publication Date
JPS52149007A true JPS52149007A (en) 1977-12-10

Family

ID=13260059

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6450376A Pending JPS52149007A (en) 1976-06-04 1976-06-04 Circuit monitor system

Country Status (1)

Country Link
JP (1) JPS52149007A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63209357A (en) * 1987-02-26 1988-08-30 Oki Electric Ind Co Ltd Key telephone set

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63209357A (en) * 1987-02-26 1988-08-30 Oki Electric Ind Co Ltd Key telephone set

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