Count of seconds during this interval that there was: xTU-C: If G.998.4 is supported and retransmission is enabled in the near-end received direction, a SES is declared if during a 1-second interval, there is one or more severe loss of error-free throughput (seftr) defect in the near-end received direction. Or else, an SES is declared if, during a 1 second interval, there are 18 or more CRC 8 anomalies in one or more of the received bearer channels, or one or more LOS defects, or one or more SEF defects, or one or more LPR defects. xTU-R: If G.998.4 is supported and retransmission is enabled in the far-end received direction, a SES-LFE is declared if during a 1-second interval, there is one or more severe loss of error-free throughput (seftr) defect in the far-end received direction. Or else, an SES is declared if, during a 1 second interval, there are 18 or more FEBE anomalies in one or more of the transmitted bearer channels, or one or more far end LOS defects, or one or more RDI defects, or one or more LPR FE defects. This parameter is inhibited during UAS. Unit: seconds