I agree with Hal.
I had a call back in the day, where a phone cord was plugged in, and it fell just on the edge of where the fork trucks ran.
Every night, the truck would take the pallet of garbage out, and run over the cord end. This would seize a line. The only way to reset it, was power cycle the system.
we put a 34D in, so we could have DSS for every station...and tracked it that way.
