ETC Congo Family v6.4.0 - Manual (Page 201)

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System Settings - Com Port
This is used to set up the COM port(s) of your Congo Jr or Congo Light Server system. This
has to be defined if you are communicating to an external device through the serial port OR
if you are using an older TT Radio Remote.
Consult the manual of your device for the required settings of the serial port. Please observe
that you cannot use the same serial port for radio remote and trigger devices at the same
time.