Review: Using powerline adapters for home networking

Computerworld - How simple is it to network your home via existing power lines?

I connected my PC's Ethernet port to a powerline adapter and plugged that adapter into a power strip that already fed several other devices. Across the room, where my home office network's 100Mbit/sec. router is located, I connected a port on that router to a second powerline adapter and plugged it into the nearest power outlet. I sat down in front of the PC, and I was online.

It's that simple.

Also, the connection felt as fast as the Ethernet cable I had been using a few moments earlier.

Subsequently, I found that I could move to any part of the house, plug in my laptop through the nearest power outlet using another adapter and be online. Unsightly Ethernet cables that had been strung through the halls could be removed.

Read Lamont Wood's analysis of today's powerline networking offerings.

I was testing examples of the latest generation of 200Mbit/sec. powerline adapters, using the HomePlug AV and Universal Powerline Association (UPA) specifications. (I didn't have access to any Panasonic High-Definition Powerline Communications units.)

HomePlug was represented by units from ActionTec Electronics Inc., Cisco-Linksys LLC and ZyXEL Communications Corp., while UPA was represented by a pair of adapters from Netgear Inc. Older, slower HomePlug 1.0 and HomePlug Turbo adapters (running at 14Mbit/sec. and 85Mbit/sec., respectively) can also be found on the market but weren't tested.

I found that the tested units were true plug-and-play devices. The only thing the average consumer would have to be mindful of is the need for at least two adapters: typically, one for each PC and one for a router. The only maintenance problem I encountered was that, after a thunderstorm, two HomePlug adapters had to be reset. (Three others weren't affected.)

An ActionTec powerline adapter, on the right, shares a power strip with several other devices amid the rat's nest of wires aside the author's desk. Using such adapters typically lets you replace a longer, room-to-room cable with a shorter one from a device to an outlet.

There were no obvious differences between the performance of the HomePlug and the UPA units -- except when I ran a hair dryer (considered a prime source of electrical noise) from the same receptacle. The HomePlug units didn't appear to notice. Throughput on the UPA units slowed to a crawl. Of course, hair dryers usually stay in other rooms, and at no point did I notice interference from any other household appliances or gadgets.