dsAdslLineAlarmExtnAtucThresh1DaySesL 1.3.6.1.4.1.6296.9.5.1.1.17.1.12

The number of Severe errored Seconds encountered by an ADSL interface, within any given 1 day performance data collection period, which causes the SNMP agent to send an 'dsAdslAtucPerfSesLThresh1DayTrap'.