Flexi WCDMA BTS undestand digits in FXDB 1.1.1, 1.2.1

Dear folk
Attached showing Flexi WCDMA BTS Module Number
Looking to understand those 3 digits number what are they ?

FXDB 1.1.1 or FXDB 1.2.1 or FRGT 1.3.1 , FRGT 1.3.2

Yes I do know what is FXDB and FRGT

Thanks.