[crizCraig]

Their site says: More dependable & better quality than other services TellFi works with the phones you have. So, unlike VoIP, you still receive calls if your Internet connection is down. Which seems to happen to everyone from time to time. Plus, call quality is always great. This answers the main objection to virtual PBX that our business had.

[tptacek]

Uh... we get calls when our Internet is down too. Always did. We're not using Vonage or something. I think the verdict is that there have been companies doing exactly what TellFi does for many years now, and many of them appear to be significantly cheaper.