just installed my alarm system and wired the panel/bellbox connections from the manual for the relevant brand of bellbox etc the alarm works 100% fine commisioned walktested etc only problem i have on testing the outputs is that the strobe doesnt work at all ? even in full alarm condition..? before i take it back to screwfix owt else i should do ? already double checked the wiring at both ends fine...if its a faulty bellbox how the hell does it get past quality control! as if it is i now have the hassle of getting the ladders back out take it down blah blah blah cheers again