JPH0398587U - - Google Patents
Info
- Publication number
- JPH0398587U JPH0398587U JP690290U JP690290U JPH0398587U JP H0398587 U JPH0398587 U JP H0398587U JP 690290 U JP690290 U JP 690290U JP 690290 U JP690290 U JP 690290U JP H0398587 U JPH0398587 U JP H0398587U
- Authority
- JP
- Japan
- Prior art keywords
- main device
- telephone
- audible signal
- active filter
- line
- 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
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Devices For Supply Of Signal Current (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP690290U JPH0398587U (un) | 1990-01-26 | 1990-01-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP690290U JPH0398587U (un) | 1990-01-26 | 1990-01-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0398587U true JPH0398587U (un) | 1991-10-14 |
Family
ID=31510571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP690290U Pending JPH0398587U (un) | 1990-01-26 | 1990-01-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0398587U (un) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01238263A (ja) * | 1988-03-18 | 1989-09-22 | Fujitsu Ltd | 単周波振幅制御方式 |
-
1990
- 1990-01-26 JP JP690290U patent/JPH0398587U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01238263A (ja) * | 1988-03-18 | 1989-09-22 | Fujitsu Ltd | 単周波振幅制御方式 |