JPS57135536A - Safety device - Google Patents

Safety device

Info

Publication number
JPS57135536A
JPS57135536A JP56021809A JP2180981A JPS57135536A JP S57135536 A JPS57135536 A JP S57135536A JP 56021809 A JP56021809 A JP 56021809A JP 2180981 A JP2180981 A JP 2180981A JP S57135536 A JPS57135536 A JP S57135536A
Authority
JP
Japan
Prior art keywords
signal
pcm
electrooptical
converter
perfectly
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
JP56021809A
Other languages
Japanese (ja)
Other versions
JPS6141179B2 (en
Inventor
Yoshitaka Hiramatsu
Tatsuhiko Katayama
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.)
SHIYOUDEN KK
Shoden Corp
Original Assignee
SHIYOUDEN KK
Shoden Corp
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 SHIYOUDEN KK, Shoden Corp filed Critical SHIYOUDEN KK
Priority to JP56021809A priority Critical patent/JPS57135536A/en
Publication of JPS57135536A publication Critical patent/JPS57135536A/en
Publication of JPS6141179B2 publication Critical patent/JPS6141179B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To insulate communication facilities electrically and perfectly by utilizing the insulating property of an optical fiber cable, to transmit an electric signal with an electrooptical converter while securing insulation between an electric center and a communication line. CONSTITUTION:A PCM coding device 162 converts a signal from a telephone circuit into a PCM code, whose electric signal is converted into an optical signal through an electrooptical signal converter 166. Further, the PCM-coded optical signal is converted into an electric signal through an electrooptical signal converter 167. Then, a PCM decoding device 163 decodes the PCM code. Thus, communication facilities are insulated electrically and perfectly from a rise in ground potential during grounding, the intrusion of a lightening surge from a communication line, etc.
JP56021809A 1981-02-17 1981-02-17 Safety device Granted JPS57135536A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56021809A JPS57135536A (en) 1981-02-17 1981-02-17 Safety device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56021809A JPS57135536A (en) 1981-02-17 1981-02-17 Safety device

Publications (2)

Publication Number Publication Date
JPS57135536A true JPS57135536A (en) 1982-08-21
JPS6141179B2 JPS6141179B2 (en) 1986-09-12

Family

ID=12065378

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56021809A Granted JPS57135536A (en) 1981-02-17 1981-02-17 Safety device

Country Status (1)

Country Link
JP (1) JPS57135536A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60213139A (en) * 1984-03-05 1985-10-25 ジヤン　ルイ　コナン Impat protecting device to communication line
JPH01256828A (en) * 1988-04-07 1989-10-13 Kimmon Mfg Co Ltd Lightening proof adaptor for communication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60213139A (en) * 1984-03-05 1985-10-25 ジヤン　ルイ　コナン Impat protecting device to communication line
JPH01256828A (en) * 1988-04-07 1989-10-13 Kimmon Mfg Co Ltd Lightening proof adaptor for communication

Also Published As

Publication number Publication date
JPS6141179B2 (en) 1986-09-12

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