Canon i-SENSYS MF729Cx Important Safety Instructions And Installation Manual page 625

When you need to change the settings of the wireless router
If the wireless router is set as described below, change the settings of the router.
The MAC address packet filtering is set.
When only IEEE 802.11n is used for the wireless communication, WEP is selected or the WPA/WPA2 encryption method is set
to TKIP.
The stealth mode is activated.