Well per min is ALL I pay.
No monthly fees, free unlimited incoming, currently have 6 lines. Just costs 1 cent a min for toll free numbers and 2 cents a min for all other USA calls.
Runs me $5 a month with my usage, cheaper than paying for a unlimited plan which they do have for $20/mo.
http://www.CallCentric.Com + Two Cisco PAP2T + a Polycom IP deskphone.
What codec does Ooma use? I'm able to set my own to 64kbps G.711u which supports faxing, and isn't Ooma just one line? I have 3 digit extension calling from any phone to any phone in the house.