The connection has timed out
That would be the easy way but rigth now ONT - ROUTER - SWTICH - ETHERNET CABLES. I can’t replace the ISP router if they don´t give me the conection details and they won´t. Any company in my country. I can´t connect ONT - ISP ROUTER (bridge) - ROUTER - SWITCH because is inside of my wall. There’s no room for another router.