I can get a call to roll to voicemail but I cannot figure out the extension of the voicemail system to configure in xlite.
You know, that is a very good question. Coming from a Nortel background, one would probably think that it’s something like 5000, or Mitel 3000 ( I think) but really you can just set this to whatever you want. Just add a line in your extensions.conf like this:
exten => 5000,1,VoiceMailMain(mailbox@context[|options])
Check this out for more detail.