JPS5422709A - Main wire monitor circuit - Google Patents

Main wire monitor circuit

Info

Publication number
JPS5422709A
JPS5422709A JP8819777A JP8819777A JPS5422709A JP S5422709 A JPS5422709 A JP S5422709A JP 8819777 A JP8819777 A JP 8819777A JP 8819777 A JP8819777 A JP 8819777A JP S5422709 A JPS5422709 A JP S5422709A
Authority
JP
Japan
Prior art keywords
monitor circuit
main wire
wire monitor
omit
minimize
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
JP8819777A
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 JP8819777A priority Critical patent/JPS5422709A/en
Publication of JPS5422709A publication Critical patent/JPS5422709A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To omit the relay circuit, to minimize the size of the PBX exchange and to reduce the power consumption as well as to increase the life time and the reliability, by using the electromagnetic converter element.
JP8819777A 1977-07-21 1977-07-21 Main wire monitor circuit Pending JPS5422709A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8819777A JPS5422709A (en) 1977-07-21 1977-07-21 Main wire monitor circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8819777A JPS5422709A (en) 1977-07-21 1977-07-21 Main wire monitor circuit

Publications (1)

Publication Number Publication Date
JPS5422709A true JPS5422709A (en) 1979-02-20

Family

ID=13936165

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8819777A Pending JPS5422709A (en) 1977-07-21 1977-07-21 Main wire monitor circuit

Country Status (1)

Country Link
JP (1) JPS5422709A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60168584A (en) * 1984-02-14 1985-09-02 Kurita Water Ind Ltd Pressure flotation type waste water treatment apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60168584A (en) * 1984-02-14 1985-09-02 Kurita Water Ind Ltd Pressure flotation type waste water treatment apparatus
JPS64112B2 (en) * 1984-02-14 1989-01-05 Kurita Water Ind Ltd

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