Hi Playing with V12 (free version), as too scared to install for real in the Office. I used to use some non-support (hardware) phones, which just didn't wont to work with V12 and using the Windows version of 3CX Phone. I have now provisioned the Yealink T20 phone and all is good, except.... I can not dial a number via the Windows 3CX phone and get it to ring the Yealink T20. This is a feature we use a lot and don't want to lose. Is this just because I using a trial version? When I try I dial the number and nothing happens. If I change it from CTI to 3CX Phone, it does dial the number and I can hear the T20 ring via my PC Speakers. Can setup V12 using my V11 Licence and test or will it cause issues with the Office versions?