There are three Acknowledgment levels that control how you must respond to a Threshold breach condition.They are:<br><br><ul><li><i>None Required</i> - When you select this option, no Acknowledgment is required for a Threshold breach.</li><li><i>Suspendible Notification</i> - With this option, once you Acknowledge or Suspend Notifications on the Threshold, you will no longer receive notifications while it is breached.You may subsequently, Resume Notifications while its breached.</li><li><i>Persistent Acknowledgment</i> - With this option, even after the Threshold has returned to normal, you must Acknowledge the Threshold and provide an optional Operator Message.</li></ul>