Same as above, Vista 21IP, EnvisaLink4. And, same in terms of used to use the IP module for Total Connect, got rid of that part some time ago as well. The only shortcoming that I have hit is that the Vista panels stop reporting sensor activity when the alarm is armed in any state. So, night, stay, away...you won't get motion, door/window, etc activity reported to IoX. Not a deal breaker for me....the couple of spots that I needed that info I've just used insteon or z-wave modules to supplement.