Canon MX450 Series Online Manual page 403

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Normally, select Auto. If you want to specify the method manually, select Open System or Shared Key

according to the setting of the access point.

If the printer cannot communicate with the computer after the encryption type of the printer was switched, make

sure that encryption types for the computer and the access point matches that set to the printer.

Changing the network settings with the USB cable temporarily may switch the default printer. In this case, reset

Set as Default Printer.

Troubleshooting