ERROR CODES.
Dial up Internet access is called a DUN, short for Dial Up Networking and while DUN is really yesterdays technology for many people it is the mainstay of their internet operations.
DUN is far more prone to errors than ADSL, and the errors are displayed as a three digit code, it is hoped that this list of error codes will be of use.
Dial-Up Networking Errors
(RAS Error Codes | Remote Access Service Error Code List)
A listing in numeric order of Microsoft Dial-Up Networking (DUNS) Error codes with the Microsoft error message follows. If there's a hyperlink, you can follow it for more information on what to do about the error. If you are getting an error that does not have more information here, please let me know! The list includes error codes for Windows 95, 98, Me, NT, 2000, XP, and Vista.
NOTE: Some solutions indicate to re-install DUNs and/or TCP/IP. See this Microsoft KB article for Win 95/98 instructions to Remove & Re-install DUNS & TCP/IP http://support.microsoft.com/kb/q181599/ . Newer versions of Windows don't allow DUNS uninstall: see Reset DUNS (TCP/IP) in Windows 2000 & XP. http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/netsh.mspx?mfr=true
Windows Vista: Dialing directly from the 'Connect To' menu or other shortcuts will not display DUNs error codes - instead, particularly large and unhelpful dialog boxes are shown. In order to see any DUNs error codes, you must dial from the 'Manage Network Connections' Window.
ERROR 50 - The request is not supported.
600 - An operation is pending.
601 - The port handle is invalid.
602 - The port is already open.>
603 - Caller's buffer is too small.
604 - Wrong information specified.
605 - Cannot set port information.
606 - The port is not connected.
607 - The event is invalid.
608 - The device does not exist.
609 - The device type does not exist.
610 - The buffer is invalid.
611 - The route is not available.
612 - The route is not allocated.
613 - Invalid compression specified.
614 - Out of buffers.
615 - The port was not found.