tough cable

Would you recommend using tough cable level 2 and the tough cable connectors connecting the cambium PMP450 into the CMM4 or am I better to just use normal shielded CAT5 and normal connectors ?

Tough cable will work for what you need.  I don't think you need to go with their connectors though.  Regular shielded connectors will work just fine.  However, i've found that the tough cable jacket is not as thick as other manufactures and if not properly installed can have holes rubbed through the jacket.

we had a number of jacket problems with tough cable 2, endedup with better luck using tough cable 1 or shiren brand cable.