Modem nekomunikuje se siti

mam internet od tmobilu modem - zyxel P660HW-T3 v2 a nekomunikuje ze siti ,pise to : Connection Test Failed Make sure your device is connected to a telephone jack using the included phone wire. Otherwise contact your ISP. If your ISP gives you a static (fixed) IP address, please configure the Internet settings on the device (click here to access the web configurator) Prosim help co stim mam delat ... ? Bez internetu moc nefunguju mamm jen nahradni kde mam uz jen 1GB na prenos dat ...