I am in the process of evaluating 3CX installation and have a few questions as to general capabilities and possible configurations. I am hoping someone out there can provide some ideas or has run into a similar situation. We are located in Mexico so our VoiP provider is not certified with 3CX. Current voice configuration: Fiber Optic lines are delivered through a Huawei SmartAX. Port 1 is our Internet access and is connected to an HP A-MSR-20 router. Port 4 is our IP phone lines w/ 20 trunks and 60 DID's. Port 4 is connected to a MediaMatrix 3000 to convert the digital signal to analog which is then connected to our very old Lucent PBX. In addition, using our Internet access from Port 1, we have two Max 420's and an account with Net2Phone for all calls made in US, Canada, Asia, and Europe (international telephone rates in Mexico are ridiculously expensive). These Max 420's are also connected to our analog PBX. Our PBX of course allows us to create routes for calls and this is how we decide whether to use our local lines or Net2Phone. Plan is to install 3CX on Dell 1950 dual quad processors, dual Nic, 8Gig RAM, 2 73Gig HD, and running Win 2008 R2. Question: How to add VoiP providers that are on two separate networks (remember our internet access is separate from our IP lines) I appreciate any guidance, help, and suggestions anyone can provide.