Primary notification of upcoming system or network downtimes, outages, or changes are through e-mail. Depending on circumstances, we will give as advance notice as possible. The mailing lists for faculty/staff are populated by the departments. The distribution scope for MCECS students typically uses your enrollment status in the current or previous term.
The DOWNTIMES section of this website contains all these notifications.
Most of these notifications can also be found on the @cat_alerts twitter feed.