6.3.2 Auxiliary Channel: Handshaking DisabledThe QSP-200/300 ports may be configured so that the RTS-CTS handshake is disabled. This isthe default configuration. In this configuration, RTS and CTS from the 16C550 UART will belooped back to each other. In addition, the auxiliary output and input signals will be looped backto each other. This configuration is shown below:RS-422/485++++----16C550UARTDATA OUTDATA INAUX OUTAUX INTXDRXD-RTS-CTSDrivers/ReceiversDriverReceiverDriverReceiverFigure 6. Auxiliary Channel Handshaking DisabledQSP-200/300 User's Manual 37
