short interruption event (SIE)

An event beginning with the occurrence of a bit error ratio (BER) of 10-2 or worse, continuously for each of three or more consecutive seconds, which can last up to 120 seconds. An SIE clears when 10 consecutive seconds pass in which none of them is an SES. Note: The 10-2 BER continuously over each second implies that all sub-intervals, where the second is divided into at least 10 equal subintervals, have a BER of 10-2 or worse. [After T1.514-1995]