Six years ago, we tested dual-WAN routers as a way to pump more bandwidth into small businesses that couldn't afford a T-1 and were stuck with relatively slow DSL and cable connections.
Today, speed is less of an issue. For example, our suburban test lab has an 18Mbps connection with AT&T's U-verse service and 15Mbps (with burst downloads as high as 30Mbps) with Time Warner Cable's Road Runner Turbo.
The critical need today is maintaining connectivity. The ability for dual-WAN routers to combine throughput from two sources, continue if one drops, then reconnect when the link comes back is a key selling point.
This story, "Supersize your WAN" was originally published by NetworkWorld.