本文件定义了指定数字光纤链路损耗预算的量化方法:在终端用户和系统集成商之间；系统集成商和子系统供应商之间；在子系统供应商和部件供应商之间，本标准规定了链接类别所需的方法和裕度。

This document defines a quantified means of specifying a digital fiber optic link loss budget: Between end users and system integrators; Between system integrators and subsystem suppliers; Between subsystem suppliers and component vendorsThe standard specifies methods and the margin required for categories of links.