bluetooth dongle with beagleboard xm

Can anyone help me in pairing my phone and sending data with
beagleboard xm. I have attached ASUS BT21 dongle to the board. I can
scan and see the visibility of my device on gtkterm screen but when i
use rfcomm connect command my phone asks for a link key or pin for
pairing which i dont have. Is there any default pin? i tried 1234 or