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This DB9 to RJ12 RS232 serial cable is a direct replacement for APC 940-0144A. It connects a computers DB9 serial port to the RJ12 console port of APC Rack PDUs and ATS devices, enabling local configuration, status monitoring and firmware upgrades. The 1.8-meter length offers flexible deployment in data cabinets, while the shielded construction reduces interference for reliable data transmission. Plug-and-play, no drivers required, ideal for IT administrators managing APC power distribution units.