Common Dial-Up Error Codes

Error Code
Error Message
Course of Action
602
The Port is Already Open

* Reboot
* FAX Program or Operator Program (answering machine) - disable and test.
* May imply modem problem.

619
The port was disconnected. * Modem may be malfunctioning.
* XP BUG
Step 1: Restart your computer. If you still have the error, go onto step 2

Step 2: Delete your RTC on Line connection. To delete your RTC on Line connection, right-click the mouse button, and left-click on Delete. Then reinstall RTC on Line according to the XP directions.
If this does not correct the error, go onto step 3

Step 3: You now need to remove the modem.
Go to Control Panel, Phone and Modems, Modems tab. Highlight the modem, and click on Remove. After which, close everything, restart your computer and Windows will reinstall the modem for you.

This is a 'bug' in the Windows XP operating system. It may or may not occur.

629
The port was disconnected by the remote machine. * Modem may be malfunctioning.
* Problem with modem's initialization string
645
Internal authentication error. * Password error - retype UserID and Password.
* Reboot.
* Delete (*.pwl) files to remove Windows passwords. Use DOS or the Find File feature in Windows to locate and then delete file.
* This can be caused by: "require encrypted password" check in the dialer settings.
650
The Remote access Server is not responding. * Usually dialing an incorrect number.
* Occurs if the dialing computer does not get either a busy signal or a modem.
* Possible extra entries in Network Control Panel.
666
Your modem (or other connecting device) is not functioning. Self explanatory.
676
The line is busy. * Occurs when "*70," is in the dial-up number to disable call waiting when user does not actually have call waiting.
* Check dial-up number.
678
There is no answer. * Usually dialing an incorrect number.
* Occurs if the dialing computer does not get either a busy signal or a modem.
679
Cannot detect carrier. * No dial tone - check for dial tone.
* Voice mail from the phone company may cause a stuttered dial-tone if there are messages. Clear messages and try again.
691
Access denied because username and/or password is invalid on the domain. * Password error - retype UserID and Password.
     

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