Check this post:http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Unified%20Communications%20and%20Video&topic=Contact%20Center&CommCmd=MB%3Fcmd%3Dpass_through%26location%3Doutline%40%5E1%40%40.2cc10426
I have between 10-15 handsets removed from 7912 phonesets because the agents use headsets. If you're interested send me an email . jlentz at sacrtdotcom.Joe
You should be able to open a browser window, enter http://unityservername/exchange/mailboxusername and access the voicemail box this way. It will open Outlook Web Access where you can view the messages and also save the .wav file.