Did you try this ?
http://nch.invisionzone.com/index.php?showtopic=11904
Good choice on axon pbx it is much better than 3cx cheaper, easier to setup and great addons. My server 2008 shows 73 of memory used with axon pbx with 3cx was 96 percent of memeory bein used.
How to activate virtual build in voice mail. Is there any way to have more incoming lines other than 3 ? I need to have but for home user buying the 250 version is too much.