External access to voicemail over SIP trunk.

If I call into the UC500 and it goes to voicemail the call gets disconnected. Internal calls are routed to voice mail as expected. When I run a debug the only things of any note are 302 Moved Temporarily and 400 Bad Request Malformed CC-Diversion/Diversion/CC-Redirect Header. I assume this is the issue but how do I fix it?

Comments
CME supports SIP 302 messages,
CME supports 302 messages, but I do not believe that CUE does.
Try the following.
conf t
voice service voip
no supplementary-service sip moved-temporarily
no supplementary-service sip refer
Thanks
Steven
Steven, You're a star. Was
Steven,
You're a star. Was banging my head on this one all day. Thank you.
Cheers
Chris