| 发明名称 |
PERMANENT CALL OBSERVATION |
| 摘要 |
PURPOSE:To improve service to the guest without using the howler tone by differing the called line indication for the B board in case of having observed the extension permanent call in the hotel etc. |
| 申请公布号 |
JPS52119008(A) |
申请公布日期 |
1977.10.06 |
| 申请号 |
JP19760034267 |
申请日期 |
1976.03.31 |
| 申请人 |
HITACHI LTD |
发明人 |
KANEKO OSAMU;USUI AKIHIRO |
| 分类号 |
H04M3/14;H04Q3/72 |
主分类号 |
H04M3/14 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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