A.11 Handling of RAN/NAS release cause values

29.2143GPPPolicy and charging control over Rx reference pointRelease 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

If the P-CSCF is required by operator policy to provide the RAN/NAS release cause information, it includes this information in the corresponding SIP message as specified in 3GPP TS 24.229 [17] when received from the PCRF (see clause 4.4.4, 4.4.6.1, 4.4.6.2, 4.4.6.3 and 4.4.6.7).