[2] Unlike earlier policy engines that were added onto an existing network to enforce policy, the PCRF is a software component that operates at the network core and accesses subscriber databases and other specialized functions, such as a charging system, in a centralized manner.
[3] Because it operates in real time, the PCRF has an increased strategic significance and broader potential role than traditional policy engines.
[5] PCRF can provide a network agnostic solution (wire line and wireless) and can also enable multi-dimensional approach which helps in creating a lucrative and innovative platform for operators.
[6] PCRF can also be integrated with different platforms like billing, rating, charging, and subscriber database or can also be deployed as a standalone entity.
[citation needed] This enables an operator to offer differentiated voice services to their user(s) by charging a premium.