NetBotz TFTP upgrade/recovery procedure
NetBotz model: 355 , 455, 450, 550, 570. ... 1) Download the most recent firmware from apc.com for your NetBotz Appliance ( 355 , 455, 450, 550, or 570). ... If the USB Serial Adapter is not showing, refer to knowledge base . ... 9) Unplug the power from the NetBotz Appliance while keeping the serial connection open.