I recently aquired an APC 7922 Switched PDU as part of a bulk purchase. Its a chonky box that sits in the rack at a data centre and distributes power to servers, switches and routers etc much like a 16 gang extension lead but it allows you to remotely switch devices on and off, monitor their power usage, and do things like add delays to devices powering up when the power is restored - useful for managinging in-rush current.
Whilst it's a nice bit of kit its not particuarily useful to me, especially give that the sockets are IEC13, so I thought I'd stick it on eBay where it could still get £100+ despite it being relatively long in the tooth.
Before I listed it I thought I'd do some house keeping - Factory reseting it, testing it worked, getting the firmware up-to-date and finally it was just an excuse to play with it as it has been several years since I worked with this kind of gear.
The following blog post should help you get an APC 7922 upgraded to the latest firmware using FTP. Why FTP? I hear you ask. Well, I can't SCP it because it uses some ancient SSH implementation that wont play ball, and I couldn't find anywhere to download the "Firmware Upgrade Utility" - so FTP it is.
Aquiring the files
The files don't appear to be available directly from the APC website but someone has hosted them on Github ( I can't speak for the authenticity or providence of these files so use at your own risk)
FTPing the files to the PDU
The process should look something like this:
Once you've uploaded both files, you should be able to connect via the serial console / telnet / ssh and confirm the version has upgraded on the top right of the status screen:
And thats it!