OK, I guess I need to start by figuring out my problem step - by -step. Would someone please send me a working SIP configuration of a uip200. My configuration only allows be to send calls, but the uip200 will never receive a phone call. My Asterisk server and phone are on different networks. The Asterisk server is on a public IP. My phone is on a dynamic IP with NAT. My configuration is: [uip200-2] type=friend secret=verysecret nat=yes qualify=yes ; I have tried never, 1000, 2000 and 5000 also host=dynamic reinvite=no canreinvite=no dtmfmode=auto dtmf=auto disallow=all allow=ulaw allow=alaw context=internal Thanks, -Steve