By using the NRP synchronization feature, users with H.323 phones can move between offices and have appropriate E911 routing for their location.

For the NRP sync feature, ensure that the authoritative Communication Manager IP Network Region information is configured in the Session Manager routing table. A Communication Manager server is authoritative for a location if the location contains media gateways and SIP endpoints that are administered on that Communication Manager server.

Therefore, if you make any change to the IP Network Map for the IP Network Region that are controlled by Communication Manager, the updates are automatically detected. These updates are replicated to the corresponding Location entries in the Session Manager routing table.