RJ45 Wire Color Function 9 pin (female) 1 (Brown) DCD- Data Carrier Detect 7 - RTS 2 (Blue)   DSR- Data Set Ready 4 - DTR 3 (Yellow) DTR - Data Terminal Ready 6 - DSR 4 (Green) GND - Signal Ground 5 - GND 5 (Red)   RXD - Receive Data 3 - TXD 6 (Black) TXD - Transmit Data 2 - RXD 7 (Orange) CTS - Clear To Send 7 - RTS 8 (Gray)  RTS - Request To Send 1&8 - DCD/CTS Also the part number for a replacement cable and adaptor is 012-1533-00. This includes a 2 m cable with RJ-45 connectors on each end. The set also includes a 9-pin adapter (103-0403-00) to connect to PCs.