it was the short or open on attack I didn't like. It was in the days of fob and (ademco iirc) had no answer. then they did the gal18 kit with keyprox. I never did the ksw prox but I understand why it was done
what is, the oap should as a tech bit of kit no longer be tech.
Old kit is that old, how would the convo be with 'ive got a 20 yr old pc and the parallel connected daisywheel printer has an issue with the e letter'