JPH01107257U - - Google Patents
Info
- Publication number
- JPH01107257U JPH01107257U JP109788U JP109788U JPH01107257U JP H01107257 U JPH01107257 U JP H01107257U JP 109788 U JP109788 U JP 109788U JP 109788 U JP109788 U JP 109788U JP H01107257 U JPH01107257 U JP H01107257U
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- telephone
- line
- extension
- central office
- 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 3
- 238000010586 diagram Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP109788U JPH01107257U (pl) | 1988-01-08 | 1988-01-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP109788U JPH01107257U (pl) | 1988-01-08 | 1988-01-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01107257U true JPH01107257U (pl) | 1989-07-19 |
Family
ID=31200685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP109788U Pending JPH01107257U (pl) | 1988-01-08 | 1988-01-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01107257U (pl) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59181870A (ja) * | 1983-03-31 | 1984-10-16 | Ricoh Co Ltd | 回線切替装置 |
| JPS61187494A (ja) * | 1985-02-15 | 1986-08-21 | Nippon Telegr & Teleph Corp <Ntt> | ボタン電話装置 |
| JPS6226967A (ja) * | 1985-07-27 | 1987-02-04 | Fuji Electric Co Ltd | 網制御装置の着信自動切換方式 |
| JPS62256556A (ja) * | 1986-04-30 | 1987-11-09 | Hitachi Elevator Eng & Serv Co Ltd | 遠隔監視装置 |
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1988
- 1988-01-08 JP JP109788U patent/JPH01107257U/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59181870A (ja) * | 1983-03-31 | 1984-10-16 | Ricoh Co Ltd | 回線切替装置 |
| JPS61187494A (ja) * | 1985-02-15 | 1986-08-21 | Nippon Telegr & Teleph Corp <Ntt> | ボタン電話装置 |
| JPS6226967A (ja) * | 1985-07-27 | 1987-02-04 | Fuji Electric Co Ltd | 網制御装置の着信自動切換方式 |
| JPS62256556A (ja) * | 1986-04-30 | 1987-11-09 | Hitachi Elevator Eng & Serv Co Ltd | 遠隔監視装置 |