METHOD AND SYSTEM FOR PROVIDING DC POWER ON LOCAL TELEPHONE LINES
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United States of America Patent
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app pub date -
May 16, 2014
filing date -
Jan 30, 2003
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
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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