I already have paired to the headset but I manually need to reconnect to it each time. It never did ask for the security number either so I wonder if it has something to do with that.
Ref:http://www.plantronics.com/north_america/en_US/products/office/wireless-headsets/voyager-510sl
Ref:http://www.plantronics.com/north_america/en_US/products/office/wireless-headsets/voyager-510sl