With 8B6T coding, the DC algorithm sometimes negates all of the ternary symbols in a code group. How does the receiver recognize this condition? How does the receiver discriminate between a negated code group and one that has not been negated? For example, the code group for data byte 00 is + - 0 0 + - and the code group for data byte 38 is the negation of that, namely, - + 0 0 - +.