A read-only CwrCwConsecutiveSevErrSecond value giving the cumulative count of Codeword Consecutive Severely Errored Seconds detected since the link was last administratively brought up, current as of this operational hour. This hourly rollup is compared against p2mpSuLink1HrCSESAlarmThresh to decide whether the consecutive-severe-error alarm trap should fire for the hour. For example, an hour with a high p2mpSu1HrConsecSvErrSeconds value but few isolated SES events would indicate the link suffered from a small number of extended outage-like bursts rather than scattered brief errors.