Please check below 2 questions.
1. Is Threshold detector and squelch timer in below block same as OOB?
This is redriver block diagram from Intel.
2. V(OOB) Input OOB threshold is OOB entry threshold?
3. What does OOB differential delta and OOB common-mode delta mean?
4. When OOB common-mode delta is below 50mV, does squelch timer send disable command to driver?