CallMgr 4.1.3 (soon to upgrade to CUCM 5 or 6), Unity 5.0.1. desired behavior is:

front desk uses 7941 phone to answer all calls. Business rules state use of FWD button to alert employee to receive Xfer. If employee doesn't want to accept call, how can front desk tranfer call directly to voicemail w/o going back through employee phone and the busy/no answer sequence? If I use Unity trunk hunt, and set to go straight to voicemail, then I lose dial-by-extension features for outside callers. So, what I'm looking for is a way to haev outside calls able to use Unity to dial non-DID extensions, while allowing front desk to transfer outside caller from front desk phone to voicemail while bypassing a second ringdown of the employee phone.

Ideas?