Router Tp-Link TL-MR3420 says that wan cable is disconnected, that is to say that there is no communication with adsl modem. The cable and modem operation is in good condition. I pray dear foristas can help me with the solution. I salute them... To strengthen the possible response: the modem, the cable, the ports and the interlocking of the rj45 connector are fine. I presume circuit failure ???,

hello check the wiring installation with a tester. from adSl greetings ok.