Power feeding system for telephone terminal in lan

Details Power feeding system for telephone terminal in lan Power feeding system for telephone terminal in lan

H - Electricity

04

M

H04M 19/00 (2006.01) H04L 12/10 (2006.01) H04L 12/28 (2006.01)

Patent

CA 2277643

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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