The fire hazard risk assessment criteria defined in this standard are considered applicable to frame and cabinetmounted equipment intended to be installed in environmentally controlled telecommunications network facilities. Examples of such locations are Central Offices@ Controlled Environmental Vaults@ and aboveground Huts. This standard does not apply to auxiliary monitoring equipment such as oscilloscopes@ personal computers@ portable test equipment@ etc.@ which are not integral to the equipment. It also does not apply to network equipment that is designed to be solely utilized in an outside plant cabinet/enclosure@ or equipment intended to be located solely at a customer premises location. Smoke@ contamination@ or other byproducts of combustion data for assessing the fire hazard of equipment is considered outside the scope of this standard Purpose The purpose of this American National Standard is to provide fire propagation hazard risk assessment criteria for equipment assemblies used in telecommunications network equipment environments.