We have a office in Greenville, NC and our long distance bill was way up there, nearly 5,000 a month. We have the Samsung iDCS500 phone system and decided to go with a PRI and Earthlink's VoIP service. For 34.99 a month we get unlimited long distance and have tied it into our phone system. I think its going well though I do get the ocassional complaint about the VoIP line breaking up, its a huge savings. We will likely purchase a separate broadband service to dedicate to the earthlink system, it will still be much cheaper in the long run.