IOGear GCL1816KITU - Manual (Page 64)

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Step 6
Read the License Agreement and click “I Agree”
then click “Next” if you wish to continue with the
firmware upgrade. Otherwise, click “Cancel” to exit
*Note: Please choose MAIN to proceed the
firmware upgrade. IO1 and IO2 are sub layers in
the KVMs firmware.
Step 7
Choose the correct KVM* that you wish to perform
firmware upgrade from the “Device List” and then
click “Next” to continue. Then the Firmware Upgrade
Utility will verify if there is a KVM connected to the
computer by the firmware upgrade cable. (Check
Firmware Version checkbox is optional)