Short answer is:, Yes, only when a fault radio is RMA, you can transfer the license key of this RMA radio to spare unit.
Long answer is: When an RMA is issued and the customer verifies that they have shipped the faulty radio to a Cambium repair facility by providing shipping details, a new license entitlement will be created and sent to the customer. This new entitlement will include the same allowed features as the previous license. The customer may then use this entitlement to generate a new license key for their spare radio.
Allen