Hi all, I recently signed up for Skype Manager, and added a SIP profile with an online number. I configured the VoIP provider in 3CX, and it worked fine... mostly. * 3CX registers with Skype * If I make outbound calls from an extension, the outbound rule routes it to Skype and my US cellphone rings with the caller ID of my Skype online number * However, if I dial from my cell phone to my online number, 3CX never sees the call. I tried connecting the softphone on my 3CX server to Skype and I get the same behaviour. I tried connecting a softphone on another server (that runs a separate 3CX installation) and the softphone receives the incoming call. So, it seems it is a firewall issue. By default 3CX uses ports 9000-9049 for RTP, but I changed the configuration in 3CX and my Grandstream gateway to use 8000-8020. I have opened ports 5060 UDP/TCP, 5090 UDP/TCP, and 8000-8020 UDP as the Skype guide says. Do you know if I need to open any other ports for the softphone to receive calls from Skype Connect? I checked the other firewall (where it worked) and apparently not. Do you have any other idea of what I could check? Thanks!!