If a user of a 5320 phone has a message waiting, hits the vm key without picking up the receiver, the display says "Call Nupoint MW". Sometimes, though, one person will accidentally hit something on their phone that causes that message to come not from NuPoint, but from their extension directly. If the person picks up the receiver and hits the VM key, it doesn't go to VM, it calls that person. What's that feature called, and how do you use it? It's not callback, that works entirely differently.