Asus RT-N12 + router can not detect the ether line connection?please help me>>>

[Shubho_EEE]

I buy a new router .though My ether line have internet connection when i try to set up it ,the router can not detect my internet conncetion

 

[Saga Lout]

As well as connecting your computer to the router, you need to connect the router to the telephone exchange.