JPS5298405A - Office line monitoring circuit - Google Patents

Office line monitoring circuit

Info

Publication number
JPS5298405A
JPS5298405A JP1483476A JP1483476A JPS5298405A JP S5298405 A JPS5298405 A JP S5298405A JP 1483476 A JP1483476 A JP 1483476A JP 1483476 A JP1483476 A JP 1483476A JP S5298405 A JPS5298405 A JP S5298405A
Authority
JP
Japan
Prior art keywords
office line
monitoring circuit
line monitoring
circuit
office
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
JP1483476A
Other languages
Japanese (ja)
Other versions
JPS5728238B2 (en
Inventor
Hiroo Iijima
Kazunori Fujita
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 JP1483476A priority Critical patent/JPS5298405A/en
Publication of JPS5298405A publication Critical patent/JPS5298405A/en
Publication of JPS5728238B2 publication Critical patent/JPS5728238B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To eliminate an error function, monitor steadily an office line condition, miniaturize and enhance a reliability of the circuit, by the use of semiconductive part.
JP1483476A 1976-02-16 1976-02-16 Office line monitoring circuit Granted JPS5298405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1483476A JPS5298405A (en) 1976-02-16 1976-02-16 Office line monitoring circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1483476A JPS5298405A (en) 1976-02-16 1976-02-16 Office line monitoring circuit

Publications (2)

Publication Number Publication Date
JPS5298405A true JPS5298405A (en) 1977-08-18
JPS5728238B2 JPS5728238B2 (en) 1982-06-15

Family

ID=11872049

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1483476A Granted JPS5298405A (en) 1976-02-16 1976-02-16 Office line monitoring circuit

Country Status (1)

Country Link
JP (1) JPS5298405A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5986545U (en) * 1982-11-30 1984-06-12 パロマ工業株式会社 water heater

Also Published As

Publication number Publication date
JPS5728238B2 (en) 1982-06-15

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