TIA issues TSB-4979 specifications for encircled flux launch conditions
The Telecommunications Industry Association (TIA) has released TSB-4979, “Practical Considerations for Implementation of Encircled Flux Launch Conditions in the Field.” The document provides specifications that define the launch condition of test sources into multimode fiber that have been standardized and are mandatory for testing optical attenuation of installed multimode fiber cabling per TIA-568.