Speaking as a junior-assistant-to-the-chief-helper datacomm trainee, 568B corresponds to the classical Bell 258A standard, which, among other things is standard in ISDN equipment. All of the ‘noninterchangeable’ fixed/surface-mount “8-postion/4-pair” blocks seem to be TIA568B.
I thoroughly detest any sort of the so-called “universal” A/B dual-coded connectors. Remember that 10baseT and 100baseT network uses two (of four) pairs.
