This paper analyzes the defects of the conventional systems of two-output optical distributors and gives the ideas and solutions.Specifically

it presents a new specification system and elaborates on its establishing method and design process.In this system

the application scopes between adjacent specifications are neither overlapped nor broken and the variations of the optical node levels of every specification always remain within the same allowable scope in different application scopes.The specifications are not chosen by calculating the splitting ratio that the network needs

but by the specification table directly according to the two-output fiber length differences.Therefore

it is very simple and convenient for the designers to use this system.