When the Interface parameter is set to Cx, Radiator uses the Diameter Cx interface, defined between IMS I-CSCF/S-CSCF and HSS, for fetching authentication vectors from the HSS. String parameters CxRealm and CxServerName are required for formatting Diameter attributes in Cx requests sent to the HSS. These parameters must be set accordingly to your naming conventions. They do not have a default value.

The configured value of CxRealm is used to set two attributes:

For example, when a client authenticates with IMSI 23201000000000 and CxRealm is set to ims.mnc001.mcc232.pub.3gppnetwork.org, Cx requests sent to the HSS contain User-Name with the value of 232010000000000@ims.mnc001.mcc232.pub.3gppnetwork.org and Public-Identity with the value of sip:+232010000000000@ims.mnc001.mcc232.pub.3gppnetwork.org

CxServerName sets the value of Server-Name attribute. The value of this attribute is in SIP-URL format and it identifies a SIP server (e.g. S-CSCF name) to the HSS.

# The MNC and MCC values match a test SIM in goodies file aka-simulator.conf
CxRealm ims.mnc001.mcc232.pub.3gppnetwork.org
CxServerName scscf.ims.mnc001.mcc232.pub.3gppnetwork.org:6060