There is a complete section in the IR829 Hardware Installation Guide that covers port characteristics, cabling, pinouts and much more.
The RJ45 serial ports of the IR809 match the RJ45 serial ports for the IR829 router. Serial port 1 can be configured for RS232 DTE only. Serial port 0 can be configured for either RS232 DCE or RS485. The Qt Serial Port module provides the following examples for reference to help understand the API usage.Running the ExamplesRs485 Serial Pinout
