Calls coming in and routing through Unity are not showing on the phone

Frequently, this is caused by the called number being manipulated in the hand off to Unity and back.

Verify these settings.

CallManager

1. System -> Service Parameters --- Service -> Cisco CallManager -> Clusterwide Parameters (Device - Phone)
   Display Original Calling Number on Transfer from Cisco Unity -> TRUE

Unity

1. Make certain the transfer type within the Call Transfer options of the Call Handler is set to "Release to switch"