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Accounting (Gz/Rf)  Application ( 3 )

The Rf reference point is located between the Charging Trigger Function (CTF) and the Offline Charging Data System (OFCS), and is used for the transport of charging events. The Gz interface is between the OCS and the PDN Gateway (PGW) and the Rf interface is between the OCS and the IMS Call Session Control Function (CSCF). The two interfaces are functionally equivalent.
Reference:  3GPP TS32.299   View
MESSAGES

Name

Code

Accounting-Request Rf 271
Accounting-Answer Rf 271