Hello, this post should show you the necessary pinouts.
http://community.cambiumnetworks.com/t5/PMP-FAQ/Cable-Diagram-for-450i-and-450m-to-UGPS/m-p/52198#M275
And this post may help for remote applications in the future.
http://community.cambiumnetworks.com/t5/PMP-FAQ/Cable-Diagram-for-450i-to-remote-450i-AP-and-also-pass-1-PPS/m-p/53997#M282