Yep, You also get a dailup account with M-Web, but NOT all ISPs give one with their ADSL. Just ask them about it when you apply for ADSL.
Again, with modem there are also allot of settings that you can change to make your connection better, like MTU Size and more. The modem self also have strings that can help. There's also software than can help you with these settings. Search around a bit, as I'm not going to try and remember my modem days...