| 发明名称 |
Entry phone system also has speech link to stations on each floor |
| 摘要 |
An entry phone system has door (TS) and dwelling stations (WSn) with bell buttons (EKTn) with bus (BL) communication to floor stations (ETSn) that control staircase lights (LTn) using separate two wire links (VLn)
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| 申请公布号 |
DE20214159(U1) |
申请公布日期 |
2003.01.30 |
| 申请号 |
DE2002214159U |
申请日期 |
2002.09.12 |
| 申请人 |
RITTO GMBH & CO. KG |
发明人 |
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| 分类号 |
H04M9/00;(IPC1-7):H04M9/02 |
主分类号 |
H04M9/00 |
| 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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