Thank you for your inquiry.
Unfortunately, the Balance One doesn’t support “Inbound Load Balancing”. That is why there is no menu for it. Please see our “Balance Model Specification” below.
Balance Model Comparison:
In order to utilize the “Inbound Load Balancing” feature, you would want at least Balance 210 or above models.
Here is a KB article about Inbound Load Balancing for your reference.