| 摘要 |
PROBLEM TO BE SOLVED: To provide a power-line carrier(PLC) network system that maintains the quality of services without giving limit on a service object (Internet access service). SOLUTION: The PLC network system of this invention is configured such that a bus distribution line connected to a pole transformer 1 is used to supply power, a master unit 2 is connected to a communication line at the side of the pole transformer 1, a slave unit 3 is connected to the distribution line, the communication line is connected to the distribution line via the master unit 2 and an LPF 4 is placed to the distribution line at the side of the pole transformer 1 at a connecting point between the communication line and the distribution line.
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