Hmm not totally sure on this one as I have an external modem that is connected to my ethernet net card, and you stated earlier in this thread that you had a 56Kb/s modem.

But if it is an external modem such as mine, connected buy USB or ethernet. You can select dsl/cable. Your ISP should have informed you what your connection speed is, as there are various types (ie. 256 KB/s or 1.5 MB/s).