NOTE: You, the customer, are solely responsible for data security. WinBook strongly recommends that you perform a backup of all personal data contained on your system prior to performing this procedure. Warning: WinBook will NOT be held responsible for any data loss incurred during this process.

This document is a compilation of Dial Up Networking Errors received in Windows and basic solutions for each error. 

Error 629

The cause of this error is "random" but usually caused by incorrect dial up settings.  Double check that TCP/IP is installed in control panel -> network, and that your password is correct.

Error 630

Your modem is not configured correctly.  See description for error 633.

Error 633

Uninstall and reinstall your modem drivers
If that doesn't fix this problem, then;

1. Search for the telephon.ini file
2. Rename the telephon.ini file to telephon.old
3. Search for tapiini.exe
4. Run the tapiini.exe file by double clicking on the icon.
5. Restart the computer

Error 640

Unable to negotiate modem connection.  This error is commonly caused by noisy phone lines, and your modem being unable to drop it's speed to suit line conditions.  Try reducing your connection speed.

Error 645

Unable to run dial up networking.  Dial up networking is not installed correctly, some components are missing or damaged.  Reinstall dial up networking.  If this does not work correctly the following files may be missing or damaged:  winsock.dll, wsock32.dll.  You may need to extract these files from the original Windows media manually.

Error 650

Treat as error 645.

Error 659

The media.ini file refers to an unknown device.  One or more of the dial up networking files is corrupt or missing.  Reinstall dial up networking.

Error 676

The line is busy.  Check that the phone number is correct.  Try to turn off dialling rules (or turn off "use area code and country code"), and try again.

Error 678

The number is not answering.  Check that the phone number is correct, and that dialling rules are not putting a 0 or such in front of the number.  Try putting 3 commas in front of the number, and a comma in between each number.  This will  slow down the dialling, which may need to be done on some older exchanges.

Error 680

No dial tone.  Try putting 1-3 commas in front of the phone number.  Check that a number does not have to be dialed to get an external line.  Check that the phone line is connected to the "line" socket on the modem.  Check that the cord between the wall  socket and the modem works.

Error 691

Can not establish a dial up networking connection.   Check your username/password.  Check  that the dial  up connection is not using a dial in script.

Error 692

Hardware failure in port or attached device.  Check that the modem is turned on and installed correctly.  Try restarting the computer.  If the error has started after a recent storm, the modem and/or COM port may have been fried.

Error 718

Can not establish a dial up networking connection.   Check your username/password.  Check  that the dial  up connection is not using a dial in script.

Error 720

Dial up networking could not negotiate a compatible set of network protocols.  Check that TCP/IP is installed.  Check that the dial  up networking connection does not have a dial in script associated with it.  Check that control panel -> network only has one dial up adapter, and one set of TCP/IP, or one set of TCP/IP per device.  If all of the above fails, reinstall TCP/IP and re-create the dial up networking connection.

Error 731

Unable to establish a dial up networking connection - protocol not configured.  Check that TCP/IP is installed, as per error 720.

Error 745

An essential file is missing.  Reinstall dial up networking.

Error 749

The Connection Manager phone number  was not saved correctly.  If using the Connection Manager software, reenter the phone number, by either picking from the address book, or manually typing the number in.

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