RS-232 (also known as EIA RS-232C or V.24) is a standard for serial binary data exchange between a DTE (data terminal equipment) and DCE (Data Communication equipment). It is commonly used in the serial ports of PCs.

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How do I get Snow Leopard to recognize an old RS-232 UPS?

Instead of blowing $100+ on a brand new UPS, I decided to try to resuscitate the ancient CPS350SL that got me through college and grad school. One $7 sealed lead-acid battery later and it's back in ...