Connection using DSL-2640T

Try this. It was meant for configuration with Streamyx but you can ask your ISP for the required values circled in the pictures.
http://whatidoonmymac.wordpress.com/2009/05/12/d-link-dsl-2640t-wireless-signal-on-but-no-internet/
good luck!

WIRELES NOT FUNCTION.BY WIRE ONE CONETER IS OK.2ND AND 3RD PORT NOT FUNCTION

Try diagnose and repaire the connection if that does not work Reset your modem it should go back to default manufacture setup.Then turn modem off and connect any computer or laptop to the modem with ethernet wire turn the modem on go back to your computer that you are connected to modem with wire go to network connections and disable the wireless Network connection and enable local area connection once you see you have connected and have internet working go to start menu you can do this on the start search bar with vista or run with any other windows version type cmd and press enter, it should bring a DOS command menu and then type in ipconfig and enter scroll up and down to where you see default gateway type that ip address to your internet browser it should take you to login screen username should be administrator password admin setup your WEB key make the wireless access available DO NOT FORGET to write the web key down, give a name to the connection and change the default password from admin to something you can remember. save the settings and turn that off keep the laptop on. Then unplug the ethernet cable and switch the network connectiion again enable wireless disable local area also you need to scan the available wireless internet and pick the one you just named use the webkey to access and save when the connection in made.