3 ms·
I actually know why this is a thing! Originally, APC UPS's used RTS/CTS flow control on the RS-232 connector for communication with the host PC. They wanted t
by bashinator 7y ago
I actually know why this is a thing! Originally, APC UPS's used RTS/CTS flow control on the RS-232 connector for communication with the host PC. They wanted to maintain this compatibility (which used a nonstandard wiring) when they later added the Smart-UPS protocol.
That said, there's absolutely zero reason to keep maintaining this ancient and dangerous option.