I'll have to refer you to the NuPoint techs however I may have mis-spoke. I know for sure this can be done with the Esna VM (6510) but I guess I can't remember seeing it done with the NuPoint. Hopefully someone will jump in here.
In any case, the call has to be front ended via auto attendant.
Also, thinking about it, UCA may be able to do this also.
Ralph