Core Network Type Restriction

The local Cause Code Mapping enables the operator to configure a preferred 5GS Mobility Management Cause Code, by ignoring the default cause code values.

The local cause code mapping can be configured in the Call Control Policy configuration, which is associated with the Operator Policy configuration.

You can configure different cause codes for different types of area restrictions. The following are a few examples:

  • Reject cause code for the area which isn’t part of the Allowed list, can be configured using the type not-in-allowed.

  • Reject cause code for the area where the UE access is part of the Not Allowed or Restrict types, can be configured using the Not Allowed type.

The local cause code mapping configuration for the registration is rejected due to the Core Network Type restrictions configured in the AMF. The 5GMM cause code is used for both UDM-based or local configuration restrictions.