Serial to RJ-45 cabling Looking at the socket with the tab on the bottom, the pin1 is on the left. RJ-45 Use 1 RTS 2 DTR 3 TXD 4 DCD 5 RXD 6 GND 7 DSR 8 CTS The above is what a MicroAnnex XL port is going to use (and the console port on any Annex 2000/3000) This corresponds to the following connections for a straight through cable: DTE DTE color RJ-45 DB-9 RJ-45 1 7 blue 2 4 orange 3 3 black 4 1 red 5 2 green 6 5 + GND yellow 7 6 brown 8 8 white