As per my previous post, my company is looking to market a VOIP solution for companies to enable Branch - Branch calls via the Internet. We were initally leaning toward configuring a network bridge via OpenVPN, but now I wonder if it is possible to use the Bridge feature built into 3CX... Our biggest challenge is that our only ISP very effectively blocks most VOIP applications as well as subscription based VPNs used to bypass the ISPs port blocking. OpenVPN was the initially concieved means of bypassing the ISP's restrictions, but I am wondering if the ports used by 3CX can be modified. To me, it would make sense if we could direct all traffic via an open UDP port, but I need confirmation that this is possible. Otherwise, its back to playing with OpenVPN config files. Any experience in port selection of the "Bridge" feature?