The scanner and computer cannot be connected over a network (when connected via wired LAN)


If the scanner cannot connect to your computer over a network, check the followings:

  1. Are the scanner and the network device (such as a switch, hub, or router) connected properly with the LAN cable?
    • Make sure that the LAN cable is fully plugged into the connector of the scanner or network device.
      If the LAN cable is connected properly, take the following actions:
      1. Replace the LAN cable.
      2. Change the port to which the LAN cable that is connected to the network device is connected.
      3. Change the transmission method of the network device to Full Duplex or Half Duplex.
  2. Is your computer connected to a network device (such as a switch, hub, or router) that can communicate with the scanner?
    • Connect your computer to a network device (such as a switch, hub, or router).
      Refer to your computer documentation for details.
  3. Is the IP address of the scanner correct?
    • Check the IP address of the scanner and set the correct IP address.
      Refer to the operator's guide for your scanner model for how to check the IP address of the scanner.
  4. Is the IP address of the scanner used by another communication device?
    • If communication devices with duplicate IP addresses exist in the same network, they cannot communicate correctly.
      Change the IP address so that it does not duplicate.
  5. Can the scanner and the computer communicate?
    • Start Command Prompt on your computer and use the ping command to specify the IP address of the scanner to check the communication status.
      If communication is not established, check the followings:
      1. If you are using MAC address filtering on the network device (such as a switch, hub, or router), set the device to allow the MAC address of the scanner.
        Refer to the operator's guide for your scanner model for how to check the MAC address of the scanner.
      2. If you are configuring protocol filtering on the network device (such as a switch, hub, or router), allow the following protocols to be used for communication.
        TCP/IP, DHCP, HTTP/HTTPS, DNS, UDP, and ICMP
      3. If the network device (such as a switch, hub, or router) prohibits communication between connected devices (for example, the network isolation function), allow it.
  6. Do you use the scanner selection tool to select a scanner?
    • Start the scanner selection tool and make sure that the scanner you want to connect to your computer is listed.
      Refer to the operator's guide for your scanner model for how to start the scanner selection tool.

You can download operator's guides for scanners from here.

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