I am a untrained rookie on ip office, my question is i am about to upgrade a 2.1(27) ip 401 NG system, i read tech bullitin 36, and 71 and none said anything about a ip 401 system. would the upgrade follow the 403 guide? and also i dont see a bin file for a 401 system in my current office suite manager 5.2(54). what you all think.