Voicemail on Qunifi OneVoice provides mailbox access to your users and hunt groups so that you never lose a call.  From there it is a simple step to enable Microsoft Unified Messaging (UM) which opens a whole new world on technology.  With UM you get Voicemail to Email, Voicemail preview (where the voicemail is transcribed to text), Voicemail playback and many other features.