JPS6473993A - Key telephone set - Google Patents
Key telephone setInfo
- Publication number
- JPS6473993A JPS6473993A JP22962887A JP22962887A JPS6473993A JP S6473993 A JPS6473993 A JP S6473993A JP 22962887 A JP22962887 A JP 22962887A JP 22962887 A JP22962887 A JP 22962887A JP S6473993 A JPS6473993 A JP S6473993A
- Authority
- JP
- Japan
- Prior art keywords
- key telephone
- telephone set
- setting
- data
- left undone
- 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
Landscapes
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Abstract
PURPOSE:To prevent a fault of talking due to setting and release left undone by automating 'absence setting' based on the illuminance around each key telephone set. CONSTITUTION:An optical sensor 4 is fitted to the surface of a key telephone set 1 and generates a voltage proportional to the illuminance around a location where the key telephone set 1 is placed. The voltage generated from the optical sensor 4 is converted into a digital data by an A/D converter 5 and inputted to a control circuit section 2. The control circuit 2, based on a digital data from the A/D converter 5, decides whether or not the data value is smaller than the preset value and sends a data of 'absence setting' to a key telephone master set 7 through a data line 6 when smaller. Thus, the setting left undone at seat leaving or the release of absence setting left undone at come back is prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22962887A JPS6473993A (en) | 1987-09-16 | 1987-09-16 | Key telephone set |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22962887A JPS6473993A (en) | 1987-09-16 | 1987-09-16 | Key telephone set |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6473993A true JPS6473993A (en) | 1989-03-20 |
Family
ID=16895174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22962887A Pending JPS6473993A (en) | 1987-09-16 | 1987-09-16 | Key telephone set |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6473993A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03160895A (en) * | 1989-11-17 | 1991-07-10 | Matsushita Electric Ind Co Ltd | Night changeover device for exchange |
US5504651A (en) * | 1993-03-31 | 1996-04-02 | Hitachi Chemical Co., Ltd. | Cooling apparatus for electronic equipment |
US5583316A (en) * | 1992-08-06 | 1996-12-10 | Pfu Limited | Heat-generating element cooling device |
US6166904A (en) * | 1992-08-06 | 2000-12-26 | Pfu Limited | Heat generating element cooling device |
-
1987
- 1987-09-16 JP JP22962887A patent/JPS6473993A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03160895A (en) * | 1989-11-17 | 1991-07-10 | Matsushita Electric Ind Co Ltd | Night changeover device for exchange |
US5583316A (en) * | 1992-08-06 | 1996-12-10 | Pfu Limited | Heat-generating element cooling device |
US6166904A (en) * | 1992-08-06 | 2000-12-26 | Pfu Limited | Heat generating element cooling device |
US5504651A (en) * | 1993-03-31 | 1996-04-02 | Hitachi Chemical Co., Ltd. | Cooling apparatus for electronic equipment |
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