I am trying to configure SPA232D G1 and SPA302D G1 232 registered successful but 302 not done.   I am facing  difficulty to register handset with base   I see software version on handset shows 2.5 and base 1.36 Please advice the solution 

hi  i am trying to stack 2960S and X . Looks like its compatible for stack, I am not sure why stack is not getting formed. Your help is greatly appreciated