VOicemaster always issues a new version to solve a problem on the previous version but they have to change always something else so this changes create a new problem for the upcoming version, the most stable version I have worked with is 2.01 SIP and H323, there are some issues with the gatekeeper neighborhood on version 2.01, if you add a gatekeeper you will not be able to erase it, I think the latest version is 2.02, I support Sysmaster equipment because of 10 bad things you can find 6 good ones and that works for me, probably not for eveyone but for me it does, I stoped trying to make it the perfect equipment because IT IS NOT, but is a pretty good one.