A simple, cost effective solution to process serial data communication between RS232 COM port devices over inexpensive cat5 cat6 RJ45 network cable
DB9 male to RJ45 modular adapter converts DB9 male connector into an RJ45 female connector (DB9 male - RJ45 Female pinout: straight through 1-1, 2-2, 3-3, 4-4, 5-5, 6-6, 7-7, 8-8, 9-x)
A pair of DB9 to RJ45 socket coupler can be used a extender to extend rs232 serial signals up to 65ft
Bi-directional DB-9 male to RJ-45 female converter comes with thumbscrews for easy and secure connection