Computers are now in more than 50% of American homes, and about 20 million of these homes have at least two computers. The multiple PC home, together with the anticipated growth of Internet appliances, has created the need for a low-cost high-performance home networking technology. One approach uses the same pair of wires as the existing analog telephone service (POTS). Standardized under the auspices of the Home Phoneline Networking Association (HPNA), this technology is already in its second generation, operating at speeds up to 16 Mbps. Phoneline networking, unlike traditional Ethernet, must work robustly over a widely disparate range of transmission channels that have significant dynamic impairments.