Question: In a Diameter charging application, if the CC-Unit-Type AVP within the Rate-Element AVP is set to MONEY, how are the Unit-Value and Unit-Cost AVPs interpreted?
Option 1: Unit-Value specifies the quantity of the monetary unit, while Unit-Cost provides the cost per unit.
Option 2: Both Unit-Value and Unit-Cost are ignored, as MONEY implies a fixed, unspecified fee.
Option 3: Unit-Value is ignored, but Unit-Cost specifies the amount of the fixed monetary fee.
Option 4: The interpretation of Unit-Value and Unit-Cost remains unchanged, with Unit-Value affecting the Unit-Cost.
Explanation: When CC-Unit-Type is set to MONEY, it indicates a fixed fee. In this case, Unit-Value is ignored because the fee's quantity is implied to be singular or fixed by the nature of MONEY. However, Unit-Cost still plays a crucial role as it specifies the actual amount of this fixed monetary fee.