Here's my guide to this --^
First step: Getting your files
Before we can install our Speedtouch modem, we have to download a file. This file is located at Alcatel's website. The file is called "Management Software". If you can't find this file (like I did), just contact them. They are happy to send it to you.
Note: Make sure you have the packages "make", "gcc" and "glibc-devel" are installed or else you won't have the possibility to compile from source.
Second step: Compiling the sourcecode
Log in as 'root'. Then go to Konsole. Unpack the package you have downloaded from the Alcatel website.
Unpack it with the following command:
$ tar -xvf speedmgmt.tar.gz
Change to the new directory "mgmt" by entering the following command:
$ cd mgmt
Now enter these commands to compile the sourcecode:
$ make install
Third step: Modifying the script
Now we have to change a line in the start script and in the file "usb.usermap". To do so, open the file /etc/hotplug/usb/speedtouch with an editor (like KEditor) and change the line "modprobe -k speedtch" to "modprobe -k speedtouch".
Now open the file /etc/hotplug/usb.usermap. Add one "0x0000" after the already existing "0x0000".
Restart the hotplug service with the command:
$ rchotplug restart
Fourth step: Finalizing settings
Now start "YaST2" and open the module Network/Basic -> DSL Configuration. You will be asked if T-Online is your provider, answer 'No'. In the next dialog enter user name, password, VPI/VCI numbers (ask your provider), and switch the "PPP mode" to "PPP over ATM".
So as you can see it's quite easy to configure it
Sources: SuSE help center and some tutorials on the web, combined to a fast & working one by me