Is there a way to "quickly" bypass the Bluetooth handsfree option for a particular call?

I have the Motorola V551. I successfully made the connections, and downloaded the address books to the Land Cruiser from both my phone and my wife's. The system seems to work flawlessly.

I just want to know if I can quickly transition to a handset, let's say for privacy if I have someone else in the car or if it get's too noisy.

I know I can turn off Bluetooth on the phone, but while on a call it would take a couple of steps.

I did look through the setup menus on the truck and nothing stands out. I'm going to comb through the trucks owner's manual again to see if I missed something.

THoughts?