JPH0415343U - - Google Patents
Info
- Publication number
- JPH0415343U JPH0415343U JP5465290U JP5465290U JPH0415343U JP H0415343 U JPH0415343 U JP H0415343U JP 5465290 U JP5465290 U JP 5465290U JP 5465290 U JP5465290 U JP 5465290U JP H0415343 U JPH0415343 U JP H0415343U
- Authority
- JP
- Japan
- Prior art keywords
- power outage
- telephone
- central office
- office line
- detection means
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Monitoring And Testing Of Exchanges (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990054652U JP2513432Y2 (ja) | 1990-05-28 | 1990-05-28 | 電話装置の停電切替回路 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990054652U JP2513432Y2 (ja) | 1990-05-28 | 1990-05-28 | 電話装置の停電切替回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0415343U true JPH0415343U (lv) | 1992-02-07 |
JP2513432Y2 JP2513432Y2 (ja) | 1996-10-09 |
Family
ID=31576905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1990054652U Expired - Lifetime JP2513432Y2 (ja) | 1990-05-28 | 1990-05-28 | 電話装置の停電切替回路 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2513432Y2 (lv) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6242697A (ja) * | 1985-08-20 | 1987-02-24 | Matsushita Electric Ind Co Ltd | ボタン電話装置 |
JPS63164561A (ja) * | 1986-12-25 | 1988-07-07 | Fujitsu Ltd | 停電用電話端末装置 |
JPS63283340A (ja) * | 1987-05-15 | 1988-11-21 | Nippon Telegr & Teleph Corp <Ntt> | 電話システムの停電通話保証方式 |
-
1990
- 1990-05-28 JP JP1990054652U patent/JP2513432Y2/ja not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6242697A (ja) * | 1985-08-20 | 1987-02-24 | Matsushita Electric Ind Co Ltd | ボタン電話装置 |
JPS63164561A (ja) * | 1986-12-25 | 1988-07-07 | Fujitsu Ltd | 停電用電話端末装置 |
JPS63283340A (ja) * | 1987-05-15 | 1988-11-21 | Nippon Telegr & Teleph Corp <Ntt> | 電話システムの停電通話保証方式 |
Also Published As
Publication number | Publication date |
---|---|
JP2513432Y2 (ja) | 1996-10-09 |
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