NetFixerFrom my cold dead handsPremiumReviews:
Another thing to consider (that I forgot to mention in my previous post) is that you may want to do some extensive fax testing using your current Vonage line before getting either a new dedicated fax line or another voice line to use for faxing.
I was able for years to use a Vonage dedicated fax line with my AT&T DSL service with no problems. But after I switched to Comcast, sending and receiving faxes became a very iffy operation. I finally had to get RingCentral fax service because faxing with Vonage over my Comcast connection was so unreliable. Right now (after Comcast loaded a newer firmware to their SMC cable gateway box), I can send and receive faxes again using a Vonage line, but I have not canceled my RingCentral account because the next SMC firmware update (or some minor change in Comcast's CMTS) could just as easily kill Vonage faxing again.
History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower