JPH0430851Y2 - - Google Patents
Info
- Publication number
- JPH0430851Y2 JPH0430851Y2 JP1987034201U JP3420187U JPH0430851Y2 JP H0430851 Y2 JPH0430851 Y2 JP H0430851Y2 JP 1987034201 U JP1987034201 U JP 1987034201U JP 3420187 U JP3420187 U JP 3420187U JP H0430851 Y2 JPH0430851 Y2 JP H0430851Y2
- Authority
- JP
- Japan
- Prior art keywords
- telephone
- circuit
- hook
- warning sound
- call
- 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987034201U JPH0430851Y2 (pl) | 1987-03-09 | 1987-03-09 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987034201U JPH0430851Y2 (pl) | 1987-03-09 | 1987-03-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63142950U JPS63142950U (pl) | 1988-09-20 |
JPH0430851Y2 true JPH0430851Y2 (pl) | 1992-07-24 |
Family
ID=30842528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1987034201U Expired JPH0430851Y2 (pl) | 1987-03-09 | 1987-03-09 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0430851Y2 (pl) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59178851A (ja) * | 1983-03-30 | 1984-10-11 | Toshiba Corp | 電話機回路 |
-
1987
- 1987-03-09 JP JP1987034201U patent/JPH0430851Y2/ja not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59178851A (ja) * | 1983-03-30 | 1984-10-11 | Toshiba Corp | 電話機回路 |
Also Published As
Publication number | Publication date |
---|---|
JPS63142950U (pl) | 1988-09-20 |
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