JPS5255306A - Dc loop monitor detection circuit - Google Patents

Dc loop monitor detection circuit

Info

Publication number
JPS5255306A
JPS5255306A JP13045375A JP13045375A JPS5255306A JP S5255306 A JPS5255306 A JP S5255306A JP 13045375 A JP13045375 A JP 13045375A JP 13045375 A JP13045375 A JP 13045375A JP S5255306 A JPS5255306 A JP S5255306A
Authority
JP
Japan
Prior art keywords
detection circuit
monitor detection
loop monitor
circuit
loop
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
JP13045375A
Other languages
Japanese (ja)
Other versions
JPS5439685B2 (en
Inventor
Shinji Okuhara
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 JP13045375A priority Critical patent/JPS5255306A/en
Publication of JPS5255306A publication Critical patent/JPS5255306A/en
Publication of JPS5439685B2 publication Critical patent/JPS5439685B2/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
    • H04M3/2272—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 obtain a DC loop monitor detection circuit which is suitably used for semiconductor integration circuit through combination of two constant current circuits to the circuit to be monitored.
JP13045375A 1975-10-31 1975-10-31 Dc loop monitor detection circuit Granted JPS5255306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13045375A JPS5255306A (en) 1975-10-31 1975-10-31 Dc loop monitor detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13045375A JPS5255306A (en) 1975-10-31 1975-10-31 Dc loop monitor detection circuit

Publications (2)

Publication Number Publication Date
JPS5255306A true JPS5255306A (en) 1977-05-06
JPS5439685B2 JPS5439685B2 (en) 1979-11-29

Family

ID=15034585

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13045375A Granted JPS5255306A (en) 1975-10-31 1975-10-31 Dc loop monitor detection circuit

Country Status (1)

Country Link
JP (1) JPS5255306A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS533109A (en) * 1976-06-30 1978-01-12 Oki Electric Ind Co Ltd Subscriber line scanning system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3401743A1 (en) * 1984-01-19 1985-07-25 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen ARRANGEMENT FOR SECURING A REAR CONNECTION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS533109A (en) * 1976-06-30 1978-01-12 Oki Electric Ind Co Ltd Subscriber line scanning system

Also Published As

Publication number Publication date
JPS5439685B2 (en) 1979-11-29

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