Canon PIXMA E481, Online Manual, Page: 591 / 776

Cannot Use the Machine on Replacing a Wireless Router or
Changing Its Settings
When you replace a wireless router, perform network setup of the machine again.
Perform network setup again according to the instructions on our website.
If the problem is not resolved, see below.
Cannot Communicate with the Machine after Applying MAC/IP Address Filtering or Entering an Encryption
Key to the Wireless Router
When Encryption Is Enabled, Cannot Communicate with the Machine after the Encryption Type Was
Switched on the Wireless Router
Cannot Communicate with the Machine after Applying MAC/IP
Address Filtering or Entering an Encryption Key to the Wireless Router
Check1
Confirm the wireless router setting.
Refer to the instruction manual provided with the wireless router or contact its manufacturer to confirm the
wireless router setting. Make sure that the computer and the wireless router can communicate with each other
under this setting.
Check2
If you are performing MAC address filtering or IP address filtering at the
wireless router, confirm that the MAC address or IP address for both the computer or the
network device and the machine are registered.
Check3
If you are using a WEP or WPA/WPA2 key, make sure that the encryption
key for the computer or the network device and the machine matches that set to the
wireless router.
Besides the WEP key itself, the key length, key format, the key ID to use, and the authentication method must
match among the machine, the wireless router, and the computer.
Normally, select Auto for the authentication method. If you want to specify the method manually, select Open
System or Shared Key according to the setting of the wireless router.
How to Set an Encryption Key
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