Core Network Type Restrictions
The AMF supports the Core Network Type restrictions to restrict the core network access to the subscriber.
The AMF enforces the restrictions in the following scenarios:
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The UDM subscription data configures restrictions for the AMF using CoreNetworkTypeRestrictions or local configuration in the Call Control Policy.
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The AMF utilizes the UDM-provided CoreNetworkTypeRestrictions. If UDM doesn't provide CoreNetworkTypeRestrictions, the AMF uses the restrictions based on the local policy configuration from the Call Control Policy.
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The Call Control Policy is configured when the availability of CoreNetworkTypeRestrictions is defined.
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The AMF uses only the UDM-provided CoreNetworkTypeRestrictions.
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You can also override the UDM-based CoreNetworkTypeRestrictions with local configuration using the override-udm-restrictions command.