This release primarily adds support for cnMaestro.
Build 16 has been posted: http://community.cambiumnetworks.com/t5/PMP-Beta/Beta-Release-14-2-1-Build-16-for-PMP-PTP-450-and-PMP-PTP-450i-is/m-p/59024
Build 19 has been posted: http://community.cambiumnetworks.com/t5/PMP-Beta/Beta-Release-14-2-1-Build-19-for-PMP-PTP-450-and-PMP-PTP-450i-is/m-p/60167#U60167
Release 14.2.1 is now official: http://community.cambiumnetworks.com/t5/PMP-450/Release-14-2-1-now-available/m-p/60661#U60661