Cobal - I'll take a stab at it, which is pure conjecture on my part from my discussions with them. First, they claim it's an issue with too many technical issues with interfacing. I'm not sure I really believe that excuse given my limited experience so far with Sangoma would indicate that the issue is with 3CX, not Sangoma. I think that it's more a tactical position for 3CX to take given the claim many of their customers use virtualization (Hyper-V, etc) and it's just easier to buddy up to Patton (which they tried to push me into) as it's all external. Don't get me wrong, I have a Patton FXO rig, good stuff. I don't like getting brow-beat into a direction because it's easy for them. At half the price of a Patton Gateway anyone can get a Sangoma gateway running on the host.