| 摘要 |
Described herein is a means by which Internet access can be obtained via normal power lines. An electricity substation (50) includes at least one RF interface (54), a computer (56) and a PSTN connection (58) for connecting it to a telephone network (60). The substation (50) is connected to an electricity distribution network (10) which feeds a plurality of residential consumers (20, 30, 40) and at least one commercial consumer (100). Each consumer (20, 30, 40, 100) has a RF interface (26, 36, 46, 160) through which their computers (24, 34, 44, 110) connect to the electricity distribution network (10). For commercial customers, only one RF interface (160) may be required to provide Internet access through which other computers (120, 130, 140) may be connected. RF interface (160) is connected to one computer (110) which is connected to an internal computer network (150), the remaining computers (120, 130, 140) being connected to the network (150). The computers use appropriate software for modulation, demodulation and decoding of the RF signals used as carriers. The data may alternatively be transmitted via a cable TV network.
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