cpAtmIfEgressIntervalNumber 1.3.6.1.4.1.9.9.319.1.2.2.1.1

Index of the table which represents the interval number. An interval number between 1 and 96, where 1 is the most recently completed 15 minute interval and 96 is the 15 minutes interval completed 23 hours an 45 minutes prior to interval 1.