Ahh, I'm only familiar with the copper side of things. But, that explains why the search came up with nothing for SFP+! > I also think that https://en.wikipedi

Ahh, I'm only familiar with the copper side of things. But, that explains why the search came up with nothing for SFP+! > I also think that https://en.wikipedia.org/wiki/Line_code https://en.wikipedia.org/wiki/Line_code is the term you're looking for. In 10G ethernet phy's, it's a multiplicative (self-synchronizing) scramblers [1] and does not use line code. From what I remember, it's statistically fine, and plays into LDPC correction easier. [1] https://www.iol.unh.edu/sites/default/files/knowledgebase/10gec/10GbE_Cl49.pdf https://www.iol.unh.edu/sites/default/files/knowledgebase/10...