Canon IB4000 series Online Manual page 340

Make sure that the channel confirmed in Check 8 can communicate with the
Check9
computer.
If not, change the channel set to the access point.
Make sure that the firewall of the security software is disabled.
Check10
If the firewall function of your security software is turned on, a message may appear warning that Canon
software is attempting to access the network. If the warning message appears, set the security software to
always allow access.
If using any programs that switch the network environment, check their settings. Some programs will enable a
firewall by default.
When using a router, connect the printer and computer to the LAN side
Check11
(same network segment).
When the printer is connected to an AirPort Base Station via a LAN, use
Check12
alphanumeric characters for the name of the network (SSID).
If the problem is not resolved, perform setup again according to the instructions on our website.
• For placement:
Make sure that there is no barrier or obstacle between the access point and the printer.
Cannot Communicate with the Printer Using the Access Point Mode
Make sure that the printer is turned on.
Check1
Is Change LAN in LAN settings under Device settings set to LAN inactive,
Check2
Wireless LAN active, or Wired LAN active?
Select AP mode active.
Is the printer selected to connect external communication devices (e.g.
Check3
computers, smartphones, or tablets)?
Select an access point name (SSID) specified for the printer as a destination for external communication
devices.
Enter a password if you specify it for the printer.
Check4
Make sure that external communication devices are not placed far away from
Check5
the printer.
Do not locate external communication devices too far away from the printer.
Make sure that there is no obstruction.
Check6
Wireless communication between different rooms or floors is generally poor. Adjust the location of the devices.
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