Ufortunately the D6686 cannot be used for this application. The Bosch D6686 version of the EDS2100 from Lantronix does not support the serial tunnel function for use with Readykey Pro or similar applications due to the inability to set the correct baud rate.
For applications using a serial tunnel from the D6600 or D6100 connected to COM3 of the receiver, it is requiered that they utiilize an alternative device server product for this purpose. A solution that will work is a Lantronix UDS1100. It can be configured in the same manner as a Bosch D6682. The product can be obtained through many distributors including Lntronix.