JPS5636255A - Off-hook detecting system - Google Patents

Off-hook detecting system

Info

Publication number
JPS5636255A
JPS5636255A JP11132779A JP11132779A JPS5636255A JP S5636255 A JPS5636255 A JP S5636255A JP 11132779 A JP11132779 A JP 11132779A JP 11132779 A JP11132779 A JP 11132779A JP S5636255 A JPS5636255 A JP S5636255A
Authority
JP
Japan
Prior art keywords
hook
exchange
signal
light
light signal
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
JP11132779A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6342918B2 (enrdf_load_stackoverflow
Inventor
Tatsu Tsuda
Michimitsu Hattori
Shuzo Morita
Haruki Fukuda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP11132779A priority Critical patent/JPS5636255A/ja
Publication of JPS5636255A publication Critical patent/JPS5636255A/ja
Publication of JPS6342918B2 publication Critical patent/JPS6342918B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/526—Optical switching systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Optical Communication System (AREA)
JP11132779A 1979-08-31 1979-08-31 Off-hook detecting system Granted JPS5636255A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11132779A JPS5636255A (en) 1979-08-31 1979-08-31 Off-hook detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11132779A JPS5636255A (en) 1979-08-31 1979-08-31 Off-hook detecting system

Publications (2)

Publication Number Publication Date
JPS5636255A true JPS5636255A (en) 1981-04-09
JPS6342918B2 JPS6342918B2 (enrdf_load_stackoverflow) 1988-08-26

Family

ID=14558388

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11132779A Granted JPS5636255A (en) 1979-08-31 1979-08-31 Off-hook detecting system

Country Status (1)

Country Link
JP (1) JPS5636255A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958962A (ja) * 1982-09-29 1984-04-04 Nippon Telegr & Teleph Corp <Ntt> 電話端末の発呼検出方式
JPH02214248A (ja) * 1989-02-14 1990-08-27 Tohoku Electric Power Co Inc 光電話機

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4847206U (enrdf_load_stackoverflow) * 1971-10-06 1973-06-21
JPS5357716U (enrdf_load_stackoverflow) * 1976-10-19 1978-05-17

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4847206U (enrdf_load_stackoverflow) * 1971-10-06 1973-06-21
JPS5357716U (enrdf_load_stackoverflow) * 1976-10-19 1978-05-17

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958962A (ja) * 1982-09-29 1984-04-04 Nippon Telegr & Teleph Corp <Ntt> 電話端末の発呼検出方式
JPH02214248A (ja) * 1989-02-14 1990-08-27 Tohoku Electric Power Co Inc 光電話機

Also Published As

Publication number Publication date
JPS6342918B2 (enrdf_load_stackoverflow) 1988-08-26

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