The purpose of this addendum is to recognize balanced twisted pair category 6 cabling and 850 nm laseroptimized 50/125 um multimode optical fiber cable by revising sub-clauses 4.4, 4.5, 5.3 and 11.2.2 of TIA/EIA-568-B.1.

These revisions are identified in the following text with additions shown in bold italics and deletions shown as strikeout.