652 There was an unrecognized response from the modem

652 Your modem (or other device) returned a message that is not listed in one or more of your script files (Pad.inf, Switch.inf, or filename .scp).If you are using a supported external modem, turn off and restart the modem, and then redial.If the problem persists, try connecting at a lower initial speed. See To change the maximum modem port speed.For the most up-to-date list of supported modems, see the Hardware Compatibility List at the Microsoft Web site (http://www.microsoft.com/). Your Windows 2000 CD includes a copy of this list ( drive: \Support\hcl.txt) that was accurate as of the date Windows 2000 was released.