I have been using USRobotics USB ADSL modem 9000 with Mac OS10.2 for last four months. No problem at all.
After upgrading to Panthera (10.3)I can not get connected to internet. I did not change my previous settings. Modem is starting up and showing all signs to be OK, as before. While trying connection displayed messasge says that PPP server can not be found or connection can not be negotiated. In Preference>Network there is information that modem cable in not connected (which is not true).
Modem drive is supppose to work for OS10.1 and higher as per USRobotics web page. I downloaded and re-installed the driver once again with no success.
Eventually I managed to get this modem connected in Classic.
(after installation relevant driver downloade from USR web site).
Any help would be welcome. If anybody is using USB ADSL modem with OS10.3 please let me know your networking settings in Preference panel.