Okay, most of the modems use the AT command set. Since you've got Windows XP, you should also have HyperTerminal. Start that application, create a new connection with a ignorable name and number (no matter what), start dialing, and cancel that.
Now you've got the terminal with direct access to your modem. Type "AT" (without the quotation marks) and hit enter. The modem should respond with "OK". Now type "ATE1" and enter, so that you can see your input (echo on). Right after that you can get informations about your modem with "ATI0", "ATI1" etc., like manufacturer, model etc. |