This notification-only value carries the physical interface number reported by the remote end of a FlexE link, included as an object in FlexE mismatch traps. An admin reads this value from a received hh3cFlexEPhyNumberMismatch trap to see what physical number the remote peer is actually using, compared against the local physical number setting. For example, a trap showing a local physical number of 2 but this remote value at 5 tells the admin the two ends were configured with mismatched physical numbers.