U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.


Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Minimum Performance Specification for Fiber Optic Cables (For Backbone, Feeder and Distribution Plant)(PE-90a) (12/22/09)