The first CPL 500 adaptors, announced earlier this year, should be available soon. As a reminder, they are little devices looking more or less like a big plug, which allow to transfer data trough electrical plug wires.
The new devices will be based on the IEEE P1901 (http://grouper.ieee.org/groups/1901/) standard with HomePlug AV2 as a commercial name. Even though that standard is still a draft, Netgear has already announced that their Powerline AV 500 (http://www.netgear.com/products/home/powerline-and-coax/high-performance/default.aspx) series will be fully compatible with it. We are seeing exactly what happened with 802.11n devices which wee sold before the standard was officially set.
Devolo (http://www.devolo.co.uk/) should also come out soon with CPL devices using the draft of that standard, which could reach one Gigabit/s. Of course, that speed is theoretical and impossible to reach because the device includes some correcting systems that slowdown the data transfer.
In some cases, Wi-Fi and CPL can complete each other well, for example to connect two Wi-Fi hotspots separated by a thick wall, or having high speed connection throughout an entire house. The important thing is to have one circuit connecting all the plugs.
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