From news in the realm of the fireproofing of railway electronics, dig the transforming cable insulation;

CABLES: Nexans has launched its Flamex Ethernet FR range of fire-resistant communication cables, which are designed to maintain their integrity during a fire so that train crew can continue using key communication and control systems.

When exposed to fire, the cable insulation, transforms from a flexible plastic covering to a tough insulating ceramic layer.

https://www.railwaygazette.com/news/technology/single-view/view/fire-resistant-ethernet-cables-launched.html

So even if the locomotive is on fire, they can connect to facebook… just joking, I assume that the internal network is Ethernet, and of course you want control during an emergency. Wonder how they get control to the other distributed power locos, it must be wireless, clearly.