APC Battery Management System - Manual (Page 169)

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USER’S GUIDE
Battery Management System
162
Firmware file transfer methods
You can use FTP or SCP to upgrade the firmware of one or more Battery
Management System Management Cards over the network.
You can use XMODEM to upgrade the firmware for a Management Card
that is not on the network.
When you use FTP or XMODEM to upgrade the firmware for a
Management Card, the APC Operating System (AOS) module must be
transferred to the Management Card before you transfer the application
module.
For more information about the firmware modules, see
Firmware files (Battery Management System) .