Super Official wroteChanging to adsl1 (g.dmt) didn't work, my modem wouldn't dial up the broadband. Changing it back to default made it function again. Anyways, thanks for your help.
EDIT: My modem isn't the tg587 v2, I have the tg585 v7 back from 2009, but everything looks the same and every command is the same
when you connected to telnet and it asked for username and pass (username: Administrator but the pass should be blank) this is how i got it to work .. also don't forget to saveall
A quick update .. CSGO now is 96-103ms .. excellent results .. that is about 30ms lower than i used to get .. i need to test the download speed but all in all i am happier