DAVIS WeatherLink APRS Add. - Manual (Page 3)

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Note: If you have more than one streaming data logger connected to your
system, it is highly recommended that you manually set the com port and
baud rate.
Consult your TNC modem and Ham Radio documentation to determine how
to configure your streaming data logger to communicate APRS data to your
Ham Radio.
Logger Type
The software indicates the logger type and firmware revision level of the
streaming data logger in the logger type box.