This DisplayString field records the wall-clock timestamp at which this measurement bin began collecting data. Because this is the currently open, still-accumulating measurement interval that keeps climbing until its boundary is reached and it rolls off into the history table, this timestamp is what you anchor every counter in the same row to — without it you cannot tell whether a spike in the traffic counters happened this morning or three intervals ago. For example, if this field reads '2026-08-07 14:00:00' for the in-progress 15-minute bin, that tells you it started at 2pm, so any alarm correlated to a 2:05pm outage should be read against this row rather than an adjacent one.