JPH02150891U - - Google Patents
Info
- Publication number
- JPH02150891U JPH02150891U JP5818989U JP5818989U JPH02150891U JP H02150891 U JPH02150891 U JP H02150891U JP 5818989 U JP5818989 U JP 5818989U JP 5818989 U JP5818989 U JP 5818989U JP H02150891 U JPH02150891 U JP H02150891U
- Authority
- JP
- Japan
- Prior art keywords
- incoming signal
- varistor
- pulse
- detection device
- incoming
- 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
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Interface Circuits In Exchanges (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5818989U JPH02150891U (sk) | 1989-05-19 | 1989-05-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5818989U JPH02150891U (sk) | 1989-05-19 | 1989-05-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02150891U true JPH02150891U (sk) | 1990-12-27 |
Family
ID=31583570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5818989U Pending JPH02150891U (sk) | 1989-05-19 | 1989-05-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02150891U (sk) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5361905A (en) * | 1976-11-16 | 1978-06-02 | Tokyo Rokuon Kougiyou Kk | Telephone calling signal detector |
| JPS54122012A (en) * | 1978-03-16 | 1979-09-21 | Nec Corp | Ringing-signal detection circuit |
-
1989
- 1989-05-19 JP JP5818989U patent/JPH02150891U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5361905A (en) * | 1976-11-16 | 1978-06-02 | Tokyo Rokuon Kougiyou Kk | Telephone calling signal detector |
| JPS54122012A (en) * | 1978-03-16 | 1979-09-21 | Nec Corp | Ringing-signal detection circuit |