Broadband Over Power Line (BPL)
Broadband over power line (BPL) is a system to transmit two-way data over the existing electrical distribution wiring in a metropolitan area. This would avoid the expense of a dedicated network of wires for data communication. However, because BPL uses some of the same radio frequencies used for over-the-air radio systems, interference is a problem. BPL would have applications in allowing utility companies to use smart metering and load management, providing two-way communication with customer equipment.
Read more about this topic: Power Line Communication
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