The following article will guide you through the upgrade process for the WTI console and power products. Directions are for both the CLI and WEB GUI :
"When upgrading firmware on a WTI Power device, will all the connected network equipment go down because they are plugged into the unit?"
The answer is simple, the power never gets cut to connected devices on a firmware upgrade.
We know your up-time is critical, for this reason as long as there is a physical power cord connected to a WTI device, your connected devices will always remain on.