This guideline provides recommended options for globally unique serial identification of infrastructure equipment used in telecommunications networks. It covers four options that can be used to ensure uniqueness in a serialization process within a company. The manufacturers@ suppliers and related services companies are responsible for ensuring that their process results in serial numbers that are unique. Intended applications include@ but are not limited to@ support of systems that automate the control of products during the processes of production@ inventory@ distribution@ field service@ and repair.