This modular adapter has a DB9 female connector that plugs into DB9 RS232 serial port and converts it to an RJ45 connection. RJ45 Pinout: Pin1 -- Blue Pin2 -- Orange Pin3 -- Black Pin4 -- Red Pin5 -- Green Pin6 -- Yellow Pin7 -- Brown Pin8 -- White * Gold plated pin * 28AWG wire * Molded Black color housing * Thumb screw