Netgear's Powerline AV 500 series comprises single-adaptor and two-adaptor starter kits. Each adaptor delivers speeds of up to 500Mb/s, Netgear said, fed through a Gigabit Ethernet port.

Of course, the devil is in the "up to", since no powerline product - or wireless, for that matter - has yet delivered real-world speeds that come close to the theoretical maxima used to market them. Adaptors based on the 200Mb/s HomePlug AV standard, for example, are so unlikely to go beyond 100Mb/s that no supplier actually equips them with a better Ethernet connector than 10/100.

IEEE P1901 is just one next-gen powerline standard. The other is G.hn, backed by the International Telecom Union (ITU). P1901 was originally set to be compatible with G.hn, but that plan was rejected late last year. It will form the basis for the next version of HomePlug.

Netgear's adaptors - some with pass-through power sockets - will be out later this autumn, priced from $159 (£103) per pair.