Early indications were that it is not, but I'm still learning. If you get on please let me know I'll usually have it on in the evening and be monitoring TG 4639 which is USA Nationwide. There is a lot of activity there although I notice people do not move off of it to regional or TAC/Local TG's once they establish communications. I know this practice is frowned upon on the DMR-MARC Network as it keys up every repeater in the country and occupies a time slot. I assume it's the same with BrandMeister although again I just haven't got that far yet. I've been running mine with the same setup after receiving my Pi 3 last week. It works dandy for DStar but results are mixed on DMR. Half of the problem may be the Tytera radio I'm using, but the other half is definitely the lack of error correction. Reportedly someone in '5 land' is working on a new software front end for the 'mini that is alleged to 'greatly improve' error correction and audio quality on DMR. #Dv4mf2 software new features windows 10.