This modular adapter has a DB25 male connector that plugs into DB25 RS232 serial port and converts it to an RJ45 connection.RJ45 Pinout:Pin1 -- BluePin2 -- OrangePin3 -- BlackPin4 -- RedPin5 -- GreenPin6 -- YellowPin7 -- BrownPin8 -- White* Gold plated pin* 28AWG wire* Molded ivory color housing* Thumb screw