In shopping around I found Ring Central which you can use with any internet service provider and use your existing phones. A simple phone adapter plugs in to your network and you plug in your phones. They have excellent customer service to help if needed.
The best part is I get a toll free number, a fax number and a local number for 1/2 of what I was paying before. Plus my faxes are now sent digitally in PDF form to my email. I'm saving paper and can view faxes on the go.
If you're looking for a few phone service, give Ring Central a Try.
Disclaimer: Obviously I love their service or I would not promote it, however full disclosure requires I let you know that Ring Central does compensate me for referrals as they will compensate you as well. They offer various gifts or gift cards for each referral. So do me a favor and do yourself a favor and check it out.