Network Communications News (NCN) December 2016 - Page 19

PON Homes of future will be stacked with technology, but what will the next stage in Internet delivery be? a twisted-pair telephone line and 56Kbps is very close to channel capacity. ADSL overcomes the voice channel’s Shannon limit simply by not using the standard voice channel; rather it uses another channel. In the telephone system, each user is connected to the CO via a twisted-pair, which is used only for a fraction of the time when we call someone and only with the lower 4KHz of channel bandwidth. What about the bandwidth above 4KHz? That is clearly unused. 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