Hi, I have a 3CX Phone System running on a virtual machine on my data center and I want to connect all my phone extensions remotely. My users are in several offices with no more than 5 extensions each. I am trying to avoid using the SIP Proxy Manager so for my test I configured 6 extensions on a remote network. I am using YeaLink T22 and T26 phones. The extensions can call external numbers and can receive calls from outside but extensions cannot call each other localy, when I call another local extension it rings but there is not voice. I configured the phone following the documentation provided by 3CX. For the this test I changed the original Linksys Router and installed a Netgear ProSafe (FVS318) in order for not have issues with all the port handling required. Any suggestion about where to look for the problem?