Power feeding system for telephone terminal in LAN
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United States of America Patent
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-
Jan 20, 2004
Grant Date -
N/A
app pub date -
Jul 13, 1999
filing date -
Aug 19, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Terminals are connected via cables in a star-shaped fashion with respect to a HUB in a LAN. Each of the cables includes therein signal lines and power feed lines. The HUB includes therein a power feed section. The power feed section and the power feed lines of each cable are connected to measure a value of current which flows in the power feed lines. If it is judged based on the measured current value that the terminal connected to the corresponding cable is a telephone terminal, the power feeding to the corresponding power feed lines is continued. On the other hand, if the terminal is judged to be a terminal other than the telephone terminal, the power feeding is stopped.
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