And, yes, when I had this service it was about $20 per month.
It was called VERIZON home connect it is unlimited local and long distance calls for $20 a month. It comes to about $25 with taxes. If you have a security system you will have the security co, add an air/cell back up for it to call out properly. Cost varies for that card from $100-$200 and is a one time cost. You will also not be able to fax. Otherwise for $25 a month you have phone service.