You might wonder why i’m posting about a old backdoor, because I acquired an APC Masterswitch AP9212 and didn’t know the password.
Let me sum up my experience so far, If you’re going to play in programming mode, prepare to break something.
I was poking around, and thanks to some recent lack of sleep I typed “14″ instead of “13″ to read the memory for the password. 14 must equate to “Reset EEPROM” since I lost the network connection straight after.
I’ve been trying to recover this, but no luck so far.