Canon MG7700 Series Online Manual page 722

With Encryption On, Cannot Communicate with Machine After
Changing Encryption Type at Wireless Router
If you change the encryption type for the machine and it subsequently cannot communicate with the
computer, make sure the encryption type for the computer and the wireless router matches the type set
for the machine.
Cannot Communicate with Machine After Enabling MAC/IP Address Filtering or Encryption Key on
Wireless Router
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