I'm using elastix for about 2 - 3 months My configuration: LAN: Elastix is on my LAN has IP 192.168.0.5/255.255.255.0 SPA3000 with IP 192.168.0.6 (trunk with PSTN and one analog wireless phone on the FXS) WAN: Modem/Router Motorola MTA with Port forwarding (5060 & 10000-20000) to my Elastix box with Dinamic IP. The modem has a DDNS Client which I setup with NO-IP address. For now it's working more or less fine. Except that when I try to connect to the no-ip address it just doesn't connect, so what I do is to figure the ip of my WAN by doing a ping to the no-ip address and then set the softphone to the IP address. It works fine but it's really annoying. I configured the Elastix box IP with FreePBX without embbebed by going into: Tools -> Asterisk SIP Settings Setting NAT -> Never IP Configuration -> Static IP External IP -> XXX.XXX.XXX.XXX Local Networks -> 192.168.0.0/255.255.255.0 I know I have not used the proper settings above but this is the only way that works, I have tryed to use IP Configuration set to dinamic and with the no-ip address but it doesnt work I mean I do not get audio either in one or other way. I want to be able to use the no-ip address since i want to use an ipkall number to receive calls from USA and I cannot make it work. Also I have a problem with the IVR not playing an mp3 message I uploaded, does anyone knows the voltage Ecuador's analog lines work with since the SPA3000 won't free the PSTN line since it doesn't hang up inmediatly (goes to voicemail records nothing and the hangs up). Please would you help me with this. I have tried almost everything to solve the problem.