Youu can find the 2200 provisioning template on Grandstreams partner page most handsets left off V12 along with an upload guide that will walk you through the steps. You can configure manually as Sigma1 stated and its no big deal, however for larger installs it can be time consuming. On a side note its a great phone works great, I've not had anyone use that handset and not love it (including myself). The problem is Grandstream has started selling its own pbx so 3cx moved them to not recommended, I like both brands and think they work great together and the majority of our users agree. If only they would play nice with eachother..... f
http://resellerconnect.grandstream.com/users/marketing?filter=templates