Our application uses a telco supplied fiber router connected to the WAN internface.
When we test the switch over to GPRS, it woks fine if the Ethernet cable to the WAN interface is removed, the router immediately changes to the GPRS and the IPSec tunnels come back up. We put the cable back, it switches back.
However, if we unplug the fiber from the telco fiber router so that the WAN Ethernet interface is still up but there is no connectivity, it will never change to GPRS and we have lost comms.
Is there a built in function to have the router switch to GPRS in the scinario?