This read-write TruthValue enables or disables the c3gNetworkChangedNotif notification, which fires when the cellular network the modem is attached to changes. An admin enables this to be alerted when a router's cellular connection switches networks, for instance moving from a home carrier network to a roaming partner, which can carry cost or performance implications. For example, a fleet-deployed router that suddenly changes networks while stationary could indicate a local tower outage forcing a failover to a different network, and this notification would flag that event.