Here is the Pinout Description for the RJ45 -
Pin Name I/O Description
1 RTS Out O Request To Send
2 DTR Out O Data Terminal Ready
3 TxD O Transmit Data
4 GND - Chassis Ground
5 GND - Chassis Ground
6 RxD I Receive Data
7 DSR I Data Set Ready
8 CTS I Clear To Send
In the zip file you will find some pinout mappings: