My mobile phone dialed this number 6 times while connected to my Plantronics Bluetooth handfree headset. This lends credence to the claim that it is an out-dial support number built into Plantronics headsets as others have claimed.
It's an out-dial customer support number built in to plantronics bluetooth headset. Mine is a Voyager Legend
Mmy plantonic headset did the same thing. Tried to dail this number.