JPS56115062A - Telephone hook-off and call signal detecting circuit - Google Patents

Telephone hook-off and call signal detecting circuit

Info

Publication number
JPS56115062A
JPS56115062A JP1730280A JP1730280A JPS56115062A JP S56115062 A JPS56115062 A JP S56115062A JP 1730280 A JP1730280 A JP 1730280A JP 1730280 A JP1730280 A JP 1730280A JP S56115062 A JPS56115062 A JP S56115062A
Authority
JP
Japan
Prior art keywords
output
circuit
call signal
capacitor
hook
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
JP1730280A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6239584B2 (enrdf_load_stackoverflow
Inventor
Kazuhiko Okutsu
Takashi Kobayashi
Norio Kataoka
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.)
Tamura Electric Works Ltd
Original Assignee
Tamura Electric Works 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 Tamura Electric Works Ltd filed Critical Tamura Electric Works Ltd
Priority to JP1730280A priority Critical patent/JPS56115062A/ja
Publication of JPS56115062A publication Critical patent/JPS56115062A/ja
Publication of JPS6239584B2 publication Critical patent/JPS6239584B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
JP1730280A 1980-02-15 1980-02-15 Telephone hook-off and call signal detecting circuit Granted JPS56115062A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1730280A JPS56115062A (en) 1980-02-15 1980-02-15 Telephone hook-off and call signal detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1730280A JPS56115062A (en) 1980-02-15 1980-02-15 Telephone hook-off and call signal detecting circuit

Publications (2)

Publication Number Publication Date
JPS56115062A true JPS56115062A (en) 1981-09-10
JPS6239584B2 JPS6239584B2 (enrdf_load_stackoverflow) 1987-08-24

Family

ID=11940202

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1730280A Granted JPS56115062A (en) 1980-02-15 1980-02-15 Telephone hook-off and call signal detecting circuit

Country Status (1)

Country Link
JP (1) JPS56115062A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57194660A (en) * 1981-05-26 1982-11-30 Hitachi Ltd Telephone circuit switching device
JPS609356U (ja) * 1983-06-30 1985-01-22 株式会社東芝 呼出信号検出回路
JPS60153661A (ja) * 1984-01-24 1985-08-13 Iwatsu Electric Co Ltd 加入者線閉結回路

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5211506A (en) * 1975-07-16 1977-01-28 Mitsubishi Electric Corp System of detecting filled line

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5211506A (en) * 1975-07-16 1977-01-28 Mitsubishi Electric Corp System of detecting filled line

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57194660A (en) * 1981-05-26 1982-11-30 Hitachi Ltd Telephone circuit switching device
JPS609356U (ja) * 1983-06-30 1985-01-22 株式会社東芝 呼出信号検出回路
JPS60153661A (ja) * 1984-01-24 1985-08-13 Iwatsu Electric Co Ltd 加入者線閉結回路

Also Published As

Publication number Publication date
JPS6239584B2 (enrdf_load_stackoverflow) 1987-08-24

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