Greetings, I've been using 3CX in a virtual machine (VPC2004) to get a better understanding of its inner workings, but I have run into one major problem... Voicemail. On a almost completely unloaded (two extensions registered, both on the local network) when calling from one extension to the other there is a 10-15 second delay between the call "pick-up" (by voicemail) and the actual start of the recorded message asking the caller to leave a message. Also, when retrieving voicemail from the system I have similar delays between every single prompt (password, press "*", etc). I've tried 3CX in both XP and Win2K VMs (16GB virtual drive and 1GB RAM) with similar results. The host computer is a 2.4GHz P4 with 3GB of RAM. I would expect that would be sufficient for such a small test configuration, so I'm guessing there is something that needs tweaking to make the VM and 3CX play nice together. Other than voicemail I am thoroughly impressed with 3CX and the quality of calls (mostly SIP to SIP or extension to extension so far). Any thoughts to get things running would be greatly appreciated. EDIT: Just a follow-up. I managed to get it working pretty well by tweaking my Virtual PC options. From the console, go to the menu bar File -> Options, under performance I selected "All running Virtual Machines get equal CPU time" and "Give processes on the host operating system priority", "Run Virtual PC at maximum speed" also works OK (its the first setting thats critical). I am now getting ~ 1-2 second delays on most voice prompts ("Enter PIN", "You have...", etc) and more importantly when a call is transferred to VM the message prompt starts very quickly. I'm sure its not workable for larger configurations, but for a home application with just a couple extensions its "good enough" for further testing.