A read-write Unsigned32 setting the per-second codeword-error threshold above which that second is classified as an Errored Second (ES) for this subscriber unit's link. This threshold defines the boundary between a second with a few tolerable errors and one bad enough to count against the link's error-second statistics that admins use to judge overall link health. For example, lowering p2mpSuLinkESThresh makes the link's Errored Seconds counter more sensitive, flagging seconds with even a modest number of codeword errors that a higher threshold would have ignored.