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This DB9 RS232 to RJ45 adapter converts traditional DB9 serial COM port to standard RJ45 network interface, allowing you to extend and transmit RS232 signals via common CAT5/CAT6 Ethernet cables. Built with high-quality durable shell and precise internal wiring, it guarantees stable and reliable serial communication without signal attenuation. Compact plug-and-play design requires no extra software or complicated setup, easy to install and use. Widely applied to industrial control devices, serial servers, POS machines, equipment debugging and office network serial port conversion scenarios.