JPH01156639U - - Google Patents
Info
- Publication number
- JPH01156639U JPH01156639U JP5321288U JP5321288U JPH01156639U JP H01156639 U JPH01156639 U JP H01156639U JP 5321288 U JP5321288 U JP 5321288U JP 5321288 U JP5321288 U JP 5321288U JP H01156639 U JPH01156639 U JP H01156639U
- Authority
- JP
- Japan
- Prior art keywords
- telephone
- speech sound
- monitoring
- attenuation adjustment
- telephone 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
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 1
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5321288U JPH01156639U (en]) | 1988-04-20 | 1988-04-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5321288U JPH01156639U (en]) | 1988-04-20 | 1988-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01156639U true JPH01156639U (en]) | 1989-10-27 |
Family
ID=31279202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5321288U Pending JPH01156639U (en]) | 1988-04-20 | 1988-04-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01156639U (en]) |
-
1988
- 1988-04-20 JP JP5321288U patent/JPH01156639U/ja active Pending