It seems that powerline networking is still in business. Linksys (Cisco) recently showcased their new powerline products at CES 2007 with a strong indication that they were not about to write it off (yet). With the HomePlug AV standard and the UPA Plugtested logo being released and implemented, many traditional networking vendors believe there is a market for it in specific market niches.

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The powerline networking concept, as the name suggest, uses your home’s powerlines to deliver data, high speed digital audio, video with speeds up to 200 Mbps, guaranteed bandwidth reservation and high reliability (using TDMA/ CSMA/ QOS).

linksys.JPGPowerline networking came up at a time where wireless networking was not a commonplace and was considered the cheaper way to network without the necessary extended installations.

However, the lack of interoperability may stunt the powerline growth. Consumers have to realize that not all powerline products are compatible as they are based on different standards (HomePlug AV , UPA, HomePlug 1.0 to name some). Powerline networks are heavily dependent on the electrical wiring of the building, how it is installed and the environment, factors of which may degrade the data signal. Saying that, there may still be a viable market for it in places where WiFi can’t be used e.g. in buildings where there is an abundance of concrete or metal.

I used powerline networking years ago and while it proved useful, it had a certain amount of random instability. Doing further tests, I narrowed it down to the state of my house wiring and how old it was. The wear and tear of the wires and the lack of insulation in the wires degraded the data signals. The power cables essentially become antennas, absorbing electrical noise in the wires. Also, with AC powerlines, my network worked well when there wasn’t any other activity on the same line e.g. like turning the blender or turning light switches on and off. That was how it was years ago and it is claimed to be solved in the currently released HomeAV and UPA specification.

What is currently out on the market is impressive, but the price tag and lack of flexibility may deter most home users from utilizing the technology, compared to its WiFi counterparts.

New Powerline networking offerings from the big players in home networking market include:

Linksys PLK200 Adapter kit, starting at $120 (pictured above)
D-Link DHP-301 Adapter, retailing at $220
Zyxel NBG-318 Router, price TBD

Press Release [UPA Plugtested logo]
Press Release [HomePlug Powerline Alliance]
Picture Source [Howstuffworks]