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 (pl) | 1988-04-20 | 1988-04-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5321288U JPH01156639U (pl) | 1988-04-20 | 1988-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01156639U true JPH01156639U (pl) | 1989-10-27 |
Family
ID=31279202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5321288U Pending JPH01156639U (pl) | 1988-04-20 | 1988-04-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01156639U (pl) |
-
1988
- 1988-04-20 JP JP5321288U patent/JPH01156639U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH01156639U (pl) | ||
| JPS61128858U (pl) | ||
| JPH0260356U (pl) | ||
| JPH0272052U (pl) | ||
| JPS63192749U (pl) | ||
| JPS62135242U (pl) | ||
| JPH0471049U (pl) | ||
| JPH0260357U (pl) | ||
| JPH0235557U (pl) | ||
| JPH01139657U (pl) | ||
| JPS6316800U (pl) | ||
| JPH0390550U (pl) | ||
| JPS6217264U (pl) | ||
| JPS5840968U (ja) | 聴音装置を利用した通信装置 | |
| JPS6165597U (pl) | ||
| JPH01172762U (pl) | ||
| JPS62151251U (pl) | ||
| JPH0262859U (pl) | ||
| JPS6266499U (pl) | ||
| JPS6135659U (ja) | 掃除機の制御装置 | |
| JPH0466847U (pl) | ||
| JPH02138997U (pl) | ||
| JPS6142164U (ja) | プレスト−ク・インタ−ホン装置 | |
| JPS63160428A (ja) | 二線式音声会議装置 | |
| JPS61158763U (pl) |