JPS6462943A - Telephone set - Google Patents
Telephone setInfo
- Publication number
- JPS6462943A JPS6462943A JP21916887A JP21916887A JPS6462943A JP S6462943 A JPS6462943 A JP S6462943A JP 21916887 A JP21916887 A JP 21916887A JP 21916887 A JP21916887 A JP 21916887A JP S6462943 A JPS6462943 A JP S6462943A
- Authority
- JP
- Japan
- Prior art keywords
- handset
- cord
- opticalsignal
- light emitting
- emitting element
- 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.)
- Pending
Links
Abstract
PURPOSE:To prevent invasion of noise due to electromagnetic induction or electric shock by connecting a handset cord by an optical fiber. CONSTITUTION:A received electric signal is converted into an opticalsignal by a light emitting element drive circuit 11 and a light emitting element 12 and listened to as a sound wave via an optoacoustic conversion means 21. Moreover, the voice to the handset 20 is sent to a photodetector 14 as an opticalsignal modulated based on its sound pressure and becomes a transmitted electric signal to a telephone set circuit. In this case, since the cord 30 of handset consists of optical fibers 31,32, 33, no noise is invaded due to electromagnetic induction and no electric shock is caused due to damaged cord 30.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21916887A JPS6462943A (en) | 1987-09-03 | 1987-09-03 | Telephone set |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21916887A JPS6462943A (en) | 1987-09-03 | 1987-09-03 | Telephone set |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6462943A true JPS6462943A (en) | 1989-03-09 |
Family
ID=16731266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21916887A Pending JPS6462943A (en) | 1987-09-03 | 1987-09-03 | Telephone set |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6462943A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5796504A (en) * | 1996-03-13 | 1998-08-18 | Hughes Electronics | Fiber-optic telemetry system and method for large arrays of sensors |
-
1987
- 1987-09-03 JP JP21916887A patent/JPS6462943A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5796504A (en) * | 1996-03-13 | 1998-08-18 | Hughes Electronics | Fiber-optic telemetry system and method for large arrays of sensors |
US6043917A (en) * | 1996-03-13 | 2000-03-28 | Hughes Electronics Corporation | Passive electro-optical acoustic sensor |
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