There is a lot of carrier hardware out there that is like that.
The only people that know anything about it are the guys at the factory, the handfull of field engineers that work for the factory and the guys that are buried deep in the end user company that never see the light of day.
None of those groups talk to anyone outside that circle. The stuff is complex enough that most people wouldn't understand anyways. -- "Above all, I would teach him to tell the truth. Truth-telling, I have found, is the key to responsible citizenship. The thousands of criminals I have seen in 40 years of law enforcement have had one thing in common: Every single one was a liar." J.E.H.