I found that the static IP address, e.g. 10.202.0.20/32 assigned to the SIM card while the connection is active (Connected state) responds to a ping even after the mobile connection on the RUT951 router has already entered the Disconnected state. And at that moment, the assigned IP address is not displayed, see the screenshot below.
In this mode, the IP address responds to a ping with a high TTL=253. However, from the router’s perspective, the same IP address does not respond correctly to a ping when in the “Disconnected” state.
Somewhere in the background, likely within the modem itself, the TCP/IP stack is still communicating with the carrier’s network in some way, and the assigned IP continues to respond, even though the WebUI displays a “Disconnected” status.
What is the problem? Is there a way to completely disable the mobile connection, such as by switching to flight mode? Can such a mode be activated via Event Juggler?