NEC is offering a trade up program for the older voice mail systems. Basically they give you licenses to match your old system. The only thing you have to do is buy new Line cards for in the Voicemail server, you can supply your own server to meet the NEC specs. Normally I have found that the Dialogic cards in the older voicemails go bad long before the actual server they are installed in. So just replacing the PC is not going to guarantee you do not have any issues.