RAT Restrictions

In a restricted RAT, the UE can’t access the network for that PLMN.

The UDM subscription data configures restrictions for AMF using RatTypeRestrictions or local configuration in the Call Control Policy.

The AMF enforces the restriction or policy configuration in the following scenarios:

  • When the UDM provides RatTypeRestrictions, the AMF enforces the restrictions.

  • When the UDM doesn’t provide RatTypeRestrictions, the AMF uses the available local policy configuration from Call Control Policy.

  • When the UDM provides the available RatTypeRestrictions and local policy is configured, the AMF uses only the UDM-provided RatTypeRestrictions. You can also override the UDM-based RatTypeRestrictions with local configuration using the override-udm-restrictions command.