Also, a modem is setup to at first detect a normal dial tone. A few things to do is go into modem properties and then diagnostics and then do a test. See if it gives any error. If it doesn't then that solves one problem. Then goto dialing properties, remove the check mark from wait for dial tone before dialing, for outside line and the one blank below it add two commas each (four total) so its like this: ,,
Then go into properties, should be a string setting. NOTE: Copy down EXACTLY anthing that is already in there, after that add the following line:
&fx3
save and restart and try again. If it doesn't work revert everything back and reinstall DUN.