The Davis Derby system in question doesn't connect to a network, you can download the info of the unit & view it on a Windows computer OR view the info on the unit if you press buttons in the correct order.

Only issues down to the actual system on the truck are normally dirty connections between the 2 pcb's inside which we strip apart & clean ( once the warranty is up of course )

Other issues are customer programming units incorrectly which we have to correct & the way it's been wired in to the truck, it looks like someone's got " My first crimp set " for xmas & been over enthusiastic wiring it up.

I hate electrical crimps, it would have been so much better if the wires had been soldered & protected by heat shrink - this is what I do when I repair them.

I also have trucks from another manufacturer with the same system retrofitted, never had an issue on these as that forklift manufacturer insists on using a plug & play wiring loom they supply if you wish to add this system on to one of there trucks.

I have heard of another new access system that is looking to break in to the UK market, apparently its big in US & growing in Europe, not had anything to do with it yet but heard good things about it from a couple of sources in the industry.