On Nov 3, 2010, at 10:08 AM, "Adcock, Matt [HISNA]" <MAdcock at hisna.com> wrote: > To my knowledge Simplex Grinnell fire detection systems currently use token ring. I can't believe I got through is thread (unless the iPhone threading is more broken than usual) without anyone mentioning the fibre channel over token ring alliance (http://fcotr.org)