JPS53149704A - Subscriber supervisory circuit - Google Patents

Subscriber supervisory circuit

Info

Publication number
JPS53149704A
JPS53149704A JP6508077A JP6508077A JPS53149704A JP S53149704 A JPS53149704 A JP S53149704A JP 6508077 A JP6508077 A JP 6508077A JP 6508077 A JP6508077 A JP 6508077A JP S53149704 A JPS53149704 A JP S53149704A
Authority
JP
Japan
Prior art keywords
supervisory circuit
subscriber
subscriber supervisory
circuit
miniaturization
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
JP6508077A
Other languages
Japanese (ja)
Inventor
Kunio Nagashima
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 JP6508077A priority Critical patent/JPS53149704A/en
Publication of JPS53149704A publication Critical patent/JPS53149704A/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
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To realize the miniaturization, low power consumption, high reliability, and long life of a circuit with the need for a relay circuit eliminated, by using a magnetoelectric converter.
JP6508077A 1977-06-01 1977-06-01 Subscriber supervisory circuit Pending JPS53149704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6508077A JPS53149704A (en) 1977-06-01 1977-06-01 Subscriber supervisory circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6508077A JPS53149704A (en) 1977-06-01 1977-06-01 Subscriber supervisory circuit

Publications (1)

Publication Number Publication Date
JPS53149704A true JPS53149704A (en) 1978-12-27

Family

ID=13276604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6508077A Pending JPS53149704A (en) 1977-06-01 1977-06-01 Subscriber supervisory circuit

Country Status (1)

Country Link
JP (1) JPS53149704A (en)

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