JPS51134506A - Subscriber's circuit - Google Patents

Subscriber's circuit

Info

Publication number
JPS51134506A
JPS51134506A JP5915275A JP5915275A JPS51134506A JP S51134506 A JPS51134506 A JP S51134506A JP 5915275 A JP5915275 A JP 5915275A JP 5915275 A JP5915275 A JP 5915275A JP S51134506 A JPS51134506 A JP S51134506A
Authority
JP
Japan
Prior art keywords
circuit
subscriber
detection
adoption
economic
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
JP5915275A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5413323B2 (en:Method
Inventor
Junji Asakura
Tsutomu Iwata
Naohiko Yasui
Nobuyoshi Akiyama
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
NTT Inc
Original Assignee
NEC Corp
Nippon Telegraph and Telephone 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 Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP5915275A priority Critical patent/JPS51134506A/ja
Publication of JPS51134506A publication Critical patent/JPS51134506A/ja
Publication of JPS5413323B2 publication Critical patent/JPS5413323B2/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)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
JP5915275A 1975-05-16 1975-05-16 Subscriber's circuit Granted JPS51134506A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5915275A JPS51134506A (en) 1975-05-16 1975-05-16 Subscriber's circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5915275A JPS51134506A (en) 1975-05-16 1975-05-16 Subscriber's circuit

Publications (2)

Publication Number Publication Date
JPS51134506A true JPS51134506A (en) 1976-11-22
JPS5413323B2 JPS5413323B2 (en:Method) 1979-05-30

Family

ID=13105079

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5915275A Granted JPS51134506A (en) 1975-05-16 1975-05-16 Subscriber's circuit

Country Status (1)

Country Link
JP (1) JPS51134506A (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5395509A (en) * 1977-01-28 1978-08-21 Western Electric Co Telephone loop current detector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187106A (en) * 1960-07-21 1965-06-01 Int Standard Electric Corp Telephone ring-trip arrangement
US3838223A (en) * 1973-10-01 1974-09-24 Gte Automatic Electric Lab Inc Ring trip and dial pulse detection circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187106A (en) * 1960-07-21 1965-06-01 Int Standard Electric Corp Telephone ring-trip arrangement
US3838223A (en) * 1973-10-01 1974-09-24 Gte Automatic Electric Lab Inc Ring trip and dial pulse detection circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5395509A (en) * 1977-01-28 1978-08-21 Western Electric Co Telephone loop current detector

Also Published As

Publication number Publication date
JPS5413323B2 (en:Method) 1979-05-30

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