Device Update Management includes the details on software updates for Avigilon Alta ACUs, Video Readers, and Video Intercom Reader devices, which are typically very small and do not introduce noticeable downtime. It includes details on when their default maintenance periods are set to run and when new updates are available.
...
You can choose to update a device manually when an update is available (by clicking Update Available in the Update Status column and following the directions), the window for the Avigilon Alta devices is within two hours for the latest update to be applied. The time it takes for the update to process depends on the type of update. Still, software updates usually take only seconds and do not cause any interruption of reader functionality unless otherwise noted.
...