>"It's confusing to me to read this -- you write like you know what you're talking about, but that can't be the case because if you knew what you were talking about you'd understand how the kind of mistake that happened can happen."

That's a pretty odd and flimsy argument that I can't know what I'm talking about if I hold an opinion that differs from your own. I have years of experience with this particular space. Had a MOP been circulated and the maintenance plan properly vetted then the need for visual confirmation because of "legacy patch panel" and "bit rot in cab" would have been identified. Further you never unplug a cable unless you first verify what the ends of the cable are connected to. As I mentioned this is "datacenter operations 101" stuff. This is not some new startup, this a publicly traded company who has been in the game for a decade now.