I have a 17" MBPro (2.3 GHz Intel Core i7) using Mountain Lion 10.8.2. On my last MBPro, I was able to access the internet using dial up when travelling to places where only a phone line was available. The Apple external travel modem I used was a model number MA034 (USB connection). When plugging that dial up modem into this newer computer with ML, I get a prompt that says essentially "you cannot use an Apple USB modem with this computer."
Do I have any way of connecting to the internet with this computer and ML? I've used a dial up ISP on a temporary basis for travel in the past with no problems (except that it is so predictably slow!).