Hello, So after some helpful advice from you all in my last post regarding our Sangoma A200, although we got it working with NBE and Sangoma's help in supplying the template files from 3CX v12 we made a decision to go with a Patton gateway regardless because the support and compatibility factor is going to be important especially when my client comes round to purchasing a 3CX license. We were going to stick with Elastix 5 (essentially the 3CX on Debian) as my client likes the thought of Linux powering the system, but this looks quite new and it appears 3CX has thrived on Windows. What are the pro's and con's? Or in general which platform is preferred predominantly by people using 3CX? I know the obvious drawbacks to Windows and performance but the machine will be a second gen quad i5, 4GB RAM, Samsung 840 Pro 256GB SSD, and Windows 7 Pro x64 but I'll be simplifying the whole OS - no unnecessary software and processes, windows update checks disabled (maintenance will be done out of hours), it'll be as stripped back as it can be without toying with services etc. Rest of system is ~40 SIP Phones, and two PSTN lines for inbound and outbound.