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3GPP S9  Application ( 16777267 )

The S9 interface provides transfer of (QoS) policy and charging control information between the Home Policy and Charging Rules Function (HPCRF) and the Visited PCRF in order to support local breakout function. In all other roaming scenarios, S9 has functionality to provide dynamic QoS control policies from the HPLMN.
Reference:  3GPP TS29.212   View
MESSAGES

Name

Code

Credit-Control-Request S9 272
Credit-Control-Answer S9 272
Re-Auth-Request S9 272
Re-Auth-Answer S9 272
Trigger-Establishment-Request 8388656
Trigger-Establishment-Answer 8388656