Well after more experience with it, the Grandstream is truly an amazing system for the price.

Their new GXV3240 video phone is a marvel. Audio quality is the best I've ever heard. HDMI port on the phone, out to a TV.

All for less than the 'basic digital' phones we used to carry.

The built-in 32-party call-in conference bridge - all in an extremely cost competitive package the size of a doorstop.

Are they perfect? - no - they have their issues and obstacles, but I just do not see losing many bids to proprietary IP PBXs.