Hi, I've got a number of 3CX sites happily on version 11. Eventually they'll have to get current. The barriers to change are the usual ... don't like change when something works well, and... cost. It's not the cost of the upgrade - insurance is in place - it's the deskphone cost if the current phones aren't compatible. Sets in use: Polycom 600, 550, 301 series, grandstream 1200/1400. Is there any hope that any of these models will work (in a basic fashion) with a current version of 3CX? The older polycoms for sure (and perhaps all polycoms) will I think need replacing, as they've always been a bear to provision and the older ones haven't had updates for years now. I haven't yet looked at the supported phones, that's my next stop. Thanks - Les.