Canon PIXMA MG5500 Series Setup Manual page 11

WPA/WPA2
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7. Press the OK button.
8. Enter the passphrase.
Character entry is case-sensitive.
9. Press the left Function button.
10. Make sure that the passphrase is correct.
11. Press the left Function button.
12. When the left screen appears, press the OK button.
The network connection setup is now complete.