We just got an Ooma VOIP phone system ($220 deal right now at Costco) and I've been testing exactly how I'll position the Hub and Scout in our house. I also wanted to make sure our fax machine will work. We don't fax very often, but it's sure nice to have when when needed (usually about once a month.) Ooma says to position a fax machine with direct phone line connection to the Hub. I tried this, but it wasn't working. I could hear the high pitch "faxing sound", but after that, the connection would fail. I found a web forum with an easy solution, simply prefix the number you are dialing with *99 and it works! Here is the Ooma forum link. Ok, now I just need to get our home phone number ported and it will be time to drop Comcast phone service and save $40 per month!