I am having issues receiving calls on my Remote IP phones, they are the Atcom 510 phones, I know not the most popular, but I gave them a shot, anyways I have all of the ports forwarded to the phone from the remote site udp 5060 and 10001 to 20000, as well those ports are forwarded to the PBX site also. I am using the stable 1.3 Elastix and have edited my sip_nat.conf file two ways, one I used the static IP address attached the the router externip=XX.xx.xx.xx localnet=192.168.1.0/255.255.255.0 and the other for dydns which I do use even though he has a static ip address (easy to remember) externhost=mydomain.dyndns.org externrefresh=120 localnet=192.168.1.0/255.255.255.0 I have not used them both at the same time I have just replaced one with the other and did amportal restart. I can make calls from all of the remote ip Extensions, but I cannot receive calls. The only way I was able to accomplish a received call is setting up and additional IAX2 extension that the ip phone accepts and then I can make and receive calls but after a couple of hours or so, this breaks so I decided to dive in head first and I have scoured the forums to find an answer. I am sure it will be something simple. But I really need to fix this so I can move on with my life. LOL. Anyways here is the pastebin from the CLI of me calling into the system and trying to dial the remote extension to test. http://pastebin.com/m1c1e2a39 . I am using a PRI and zaptel. The phones register for both SIP and IAX, but I know I am doing something wrong. He has Linksys WRTG54 routers at each site. I know they are not built for VOIP but I would think as long as the ports are forwarded then I should be fine. Any help would be a God Send. Thanks.