My phone system is randomly dropping calls. I have 3CXv8 installed on an XP VM in Hyper-V. I'm using Callcentric as my VOIP provider. I don't see any errors in the logs (3CX or phones) or the event viewer on the server. I've had this happen to me as well as others, audio stops, then the call disconnects. Screen shots and log files can be found here... http://dl.dropbox.com/u/3594910/3cx_files.zip You can see in the 3CX log that call 83 was disconnected.