Take the Card access unit below.
Besides being a mess they did not use proper shielded wire to insure there is no cross talk on the readers where you present your card .They just used plain old straight wire.
Doors unlock by them selves cards some times work and open doors and some times none of the doors work all because the signal from the readers to the main control are picking up stray noise whih causes the system to be erratic.
this same outfit who did this bad install and ides around Pittsburgh with there fancy mobile command post also installed card access equipment in a elevator control room which is a major violation of building codes but they could care less. I have also seen how poorly they install cameras where they work for a year then quit .But they go all over western Pa. telling everyone how good they are.
Yes this $20,000 7 door system is a total disaster they installed and now I must go over entire system and replace components and wiring all because if lack of surge suppressors and proper wiring .
But these hacks exist because customer instead of going after them just right it off as a loss and in this case tax payer money paid for this install in the way of a grant. what a dam shame.