This specification is part of the Four Level TIA/EIA specification system defined in EIA Engineering Publication EP-11-A. This Blank Detail Specification is a supplementary document to Sectional Specification TIA/EIA 620A000 and contains requirements for style, layout, and minimum content of Detail Specifications for fiber optic branching devices. This Specification applies to uniform (equal splitting ratio) single-mode passive braching devices that are designed for outside plant applications.