CDF – Charging Data Function
The CDF is an entity within the IMS (IP Multimedia Subsystem) billing architecture which is responsible for collating accounting requests from IMS CTF (Charging Trigger Functions) such as CSCF (Call Session Control Functions) and AS (Application Servers). The CDF will use the accounting requests to generate CDR (Charging Data Records), which will then be directed to the CGF (Charging Gateway Function) and then on to the billing domain.
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