发明名称 |
Telephone communications filtering unit |
摘要 |
The unit generates a continuous voltage freeing the telephone line when a telephone is picked up and can block the line when the phone is put down. The unit has a microprocessor which detects a correct authorization number and sets the line accordingly.
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申请公布号 |
FR2769448(A1) |
申请公布日期 |
1999.04.09 |
申请号 |
FR19970012413 |
申请日期 |
1997.10.06 |
申请人 |
MASCHIO NICOLE |
发明人 |
MASCHIO NICOLE |
分类号 |
H04M1/677;(IPC1-7):H04M1/66 |
主分类号 |
H04M1/677 |
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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