JPS643356U - - Google Patents
Info
- Publication number
- JPS643356U JPS643356U JP9728787U JP9728787U JPS643356U JP S643356 U JPS643356 U JP S643356U JP 9728787 U JP9728787 U JP 9728787U JP 9728787 U JP9728787 U JP 9728787U JP S643356 U JPS643356 U JP S643356U
- Authority
- JP
- Japan
- Prior art keywords
- detection
- dsc
- photocoupler
- control circuit
- network control
- 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
- 238000001514 detection method Methods 0.000 claims description 11
- 230000035945 sensitivity Effects 0.000 claims 2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9728787U JPS643356U (enExample) | 1987-06-26 | 1987-06-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9728787U JPS643356U (enExample) | 1987-06-26 | 1987-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS643356U true JPS643356U (enExample) | 1989-01-10 |
Family
ID=31322618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9728787U Pending JPS643356U (enExample) | 1987-06-26 | 1987-06-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS643356U (enExample) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6059855A (ja) * | 1983-09-12 | 1985-04-06 | Nec Corp | 着信信号および相手応答検出回路 |
-
1987
- 1987-06-26 JP JP9728787U patent/JPS643356U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6059855A (ja) * | 1983-09-12 | 1985-04-06 | Nec Corp | 着信信号および相手応答検出回路 |