发明名称 |
Method and system for providing DC power on local telephone lines |
摘要 |
A telephone unit device connectable in series between a telephone set and a wire pair coupled to a telephone service and carrying DC power and an AC telephone signal. The device includes: a first connector connectable to the wire pair; a second connector connectable to the telephone set; means connected between the first and second connectors for passing substantially without change the AC telephone signal between the wire pair and the telephone set; and means connected between the first and second connectors for receiving DC power only from the wire pair and converting the DC power to a level suitable for proper telephone operation of the telephone set connected thereto.
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申请公布号 |
US2007127715(A1) |
申请公布日期 |
2007.06.07 |
申请号 |
US20060640300 |
申请日期 |
2006.12.18 |
申请人 |
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发明人 |
BINDER YEHUDA;HAZANI AMI;KOFMAN SEMION |
分类号 |
H04M1/00;H04M9/00 |
主分类号 |
H04M1/00 |
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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