JPS574646A - Switch box system - Google Patents
Switch box systemInfo
- Publication number
- JPS574646A JPS574646A JP7801180A JP7801180A JPS574646A JP S574646 A JPS574646 A JP S574646A JP 7801180 A JP7801180 A JP 7801180A JP 7801180 A JP7801180 A JP 7801180A JP S574646 A JPS574646 A JP S574646A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- switch box
- state
- audible
- lamp
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
- H04M3/62—Keyboard equipment
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Selective Calling Equipment (AREA)
Abstract
PURPOSE:To realize a use of a switch box for a blind operator, by detecting optically the on-and-off state of a lamp provided on the control face of the switch box and converting the on-and-off state into audible signals. CONSTITUTION:The on-and-off state of a lamp on the control face of a switch box is detected by a photoelectric detecting circuit PHOS containing a photodiode, a phototransistor and others and then converted into electric signals to be amplified by an amplifying circuit AMP. At the same time, the audible signals produced by an audible signal generating circuit OSC are converted into the variation of audible signals in accordance with the on-and-off state of the lamp on the control face through an audible signal control circuit ATCNT. This variation of audible signals is supplied to a telephone receiving circuit through a mixing circuit MIX and then sent to a telephone receiver R.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7801180A JPS574646A (en) | 1980-06-10 | 1980-06-10 | Switch box system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7801180A JPS574646A (en) | 1980-06-10 | 1980-06-10 | Switch box system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS574646A true JPS574646A (en) | 1982-01-11 |
Family
ID=13649841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7801180A Pending JPS574646A (en) | 1980-06-10 | 1980-06-10 | Switch box system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS574646A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3519117A1 (en) | 1984-05-28 | 1985-11-28 | Dainippon Ink And Chemicals, Inc., Tokio/Tokyo | RESINABLE RESIN THROUGH ACTIVATING ENERGY |
JPS61145214A (en) * | 1984-12-18 | 1986-07-02 | Sony Corp | Photocurable photosensitive composition |
-
1980
- 1980-06-10 JP JP7801180A patent/JPS574646A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3519117A1 (en) | 1984-05-28 | 1985-11-28 | Dainippon Ink And Chemicals, Inc., Tokio/Tokyo | RESINABLE RESIN THROUGH ACTIVATING ENERGY |
US4690987A (en) * | 1984-05-28 | 1987-09-01 | Dainippon Ink And Chemicals, Inc. | Activation energy-curable resin composition |
JPS61145214A (en) * | 1984-12-18 | 1986-07-02 | Sony Corp | Photocurable photosensitive composition |
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