Just curious then are you putting them on the web with a public ip and have you had any hacker problems. I have two P4s working between two offices. There are some funny things going on due to different switchs. Using one P4 I get ring back tone but no connection, with another P4 I get no ring back tone but get connection. The P4 that gives ring back tone and no conection on outgoing calls recieves no problem. Any thoughts on that one?