HP Deskjet 450 series - HP Jornada 500;900 Series Printing; HP Jornada 700 Series Printing

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7. Tap Tools > Settings for All Devices.
8. Tap the Serial Port tab. Note the value in the Outbound COM Port field. You will
need this information when printing using HP Mobile Printing for Pocket PCs.
In the example below, the Outbound COM Port is COM8.