to 3GPP TS 24.229 [89] annex B and annex L.
0 Preference of P-CSCF address discovery not influenced by +CGDCONT
1 Preference of P-CSCF address discovery through NAS signalling
2 Preference of P-CSCF address discovery through DHCP
<IM_CN_Signalling_Flag_Ind>Integer type; indicates to the network whether the PDP context is for IM
CN subsystem related signalling only or not.
0 UE indicates that the PDP context is not for IM CN
subsystem-related signalling only
1 UE indicates that the PDP context is for IM CN
subsystem-related signalling only
<NSLPI> Integer type; indicates the NAS signalling priority requested for this
PDP context
0 Indicates that this PDP context is to be activated with the
value for the low priority indicator configured in the MT.
1 Indicates that this PDP context is to be activated with the
value for the low priority indicator set to "MS is not
configured for NAS signalling low priority".
The MT utilizes the provided NSLPI information as
specified in 3GPP TS 24.301 [83] and 3GPP TS 24.008.
<securePCO> Integer type. Specifies if security protected transmission of PCO is
requested or not (applicable for EPS only).
0 Security protected transmission of PCO is not requested
1 Security protected transmission of PCO is requested
<IPv4_MTU_discovery> Integer type; influences how the MT/TA requests to get the IPv4 MTU
size, refer to 3GPP TS 24.008 subclause 10.5.6.3.
0 Preference of IPv4 MTU size discovery not influenced by
+CGDCONT
1 Preference of IPv4 MTU size discovery through NAS
signalling