The total amount of time in one-hundreds of a second that the probe is sure this LCI was down, i.e., the total time the value of wanFrPvcStatsState was equal to down(3). A value of less than the age of this entry does not necessarily mean that this LCI was up at some point. It only means the probe was not certain it was down. Note: the sum of wanX25PvcStatsUpTime and wanFrPvcStatsDownTime may be less than the age of this entry. In this case, the unaccounted for time is the time the probe was uncertain of the state of this DLCI, i.e., the total time the value of wanFrPvcStatsState was unknown(3).