Dial-Up Networking Error Codes

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Dial-Up Networking Error Codes When you attmpt to connect to US Netizen using your modem, you may get an error. Windows usually generates an error code that can be helpful in determing the problem. Here's a quick-fix guide for some basic connection problems you might encounter. Contact our technical support at 1-866-350-9085 if you need further help.

Windows 95/98/ME Dial-Up Networking error codes

Windows 2000/XP/Vista Dial-Up Networking error codes

Common problems

I am getting an error code when attemping to connect to US Netizen.

Please write down the complete error code. Some common Dial-Up Networking (DUN) error codes are listed below. If you are unable to solve the error yourself, please call US Netizen support and read the error code to the technician.

Error 172: (no server assigned) the request is not seen on the network.
Please close the connection and try again
Error 602: The modem is being used by another Dial-up Networking connection.
Close the other connection, and then try again. If you can't find another connection to disconnect, reboot and try again. If this persists after a reboot, you may have encountered spyware that has installed a dialer without your knowledge. See our Spyware page for solutions. If there are multiple modems set up on the computer make sure the dialer is looking at the correct modem. Check for any fax software or any other software that might be trying to use the modem.
Microsoft Help on this Error

Error 629: You have been disconnected from the computer you dialed.
Double-click the connection to try again.
There are several reason why you may be receiving the error 629. Below are a few examples:
The modem driver is corrupt
The DUN connection is dialing an invalid access number
The modem is not attempting a compatible connection
Authentication failure (invalid username or password)
Invalid or corrupt DUN connection settings

There are several reasons why a customer could receive this error message. Be sure to verify that they are using the correct username and password. Check to see what phone number they are dialing and make sure it isn't set to use area code and dialing properties. You should also verify TCP/IP settings. Have the customer take out the password and try to connect without it; if they aren't prompted for password delete TCP/IP and reinstall. It might also be necessary to remove and reinstall Dial-Up Networking.

Check the following:

Change the authentication to Clear Text under Security.
Lower the connection speed under Modem Configuration.
Disable hardware flow control under Modem Configuration.
Disable modem error control under Modem Configuration.
Disable modem compression under Modem Configuration.
Disable PPP LCP extensions.
Disable IP header compression.
Check DNS configuration.
Check the user name and password syntax.
Connect using a Terminal window.
Contact the modem's manufacturer for updated drivers.
Have the phone company check the phone lines.

Error 630: The computer is not receiving a response from the modem.
Check that the modem is plugged in, and if necessary, turn the modem off, and then turn it back on. This error usually occurs if there is a problem with the actual modem.
There are several steps to uninstall the modem and it's drivers and then reinstall them.
Once this process has been complete there are a limited number of things that can be wrong with the actual settings of the computer. Verify that the dialer is looking at the correct modem. If the modem is internal, restart the computer and see if the modem will respond. If the modem is external; turn the modem off and then back on. You may want to check if they have an Init string entered in the extra settings box. If so, take out the string and restart the computer. As a last resort go into modem control panel, click the diagnostic tab, click the port corresponding with the modem and click more info. If you don't receive a response it may be necessary to remove and reinstall the modem. Use your best judgement when working with a customer's modem and make sure they have any needed software before doing so. Microsoft Help on Error 630 for Windows 95

Error 633: The modem is not installed or configured for Dial-Up Networking.
To check your modem configuration, double click the Modems icon in Control Panel.

Dial-Up Networking: Error 635 Cannot establish the Dial-Up Networking session.
Go to My Computer, Dial-Up Networking and go the properties of the SydCom icon. Click the Server Type tab and verify settings. Be sure that Enable software compression and TCP/IP are the only ones selected. Click the TCP/IP settings button and verify settings there. Click OK to save changes.

Dial-Up Networking: Error 645 Dial-Up Networking could not complete the connection to the server.
Go to My Computer, Dial-Up Networking and go to the properties of the SydCom icon. Click the server type tab and take the check out of the box that says Require encrypted password. Have the customer try to connect again.

Error 650: The computer you're dialing in to does not respond to a network request.
Check your server type settings in the properties of the connection.
If this problem persists, check with your network administrator. Go to My Computer, Dial-Up Networking and the properties of the SydCom icon. Click on the server types tab and make sure the settings are as they should be. You may also want to check DNS settings in the network control panel. Microsoft help on Error 645

Dial-Up Networking: Error 676 The line is busy.
There are a couple reasons a customer may get this error message. The first could be that the number is actually busy. Check the portmaster they are dialing or try dialing the access number yourself. If the number isn't busy you should check their settings. Double check that the number they are dialing is the correct one for their area. You may also want to see if the customer needs to dial a prefix to get an outside line.

Error 678: The computer you are dialing is not answering.
Disconnect and redial.

Error 680: No Dial Tone.
Verify that your phone line is properly connected to your modem. Verify that your telephone has a dial tone. Microsoft Help on Error 680 for Windows NT and 95

Error 691: The computer you are dialing in to cannot establish a Dial-Up Networking connection.
This is a common error and is only caused by one thing: an incorrect user name or password. Please enter your full username including @usnetizen.com. Check your password, and then try again.

Error 691: Access was denied because the username and/or password was invalid on the domain. This error can only be caused by one thing, the username and/or password you have entered to connect does not match the username and/or password we have on our servers. Occasionally this can be down to a server problem, however the majority of the time a simple re-type of the username and password when attempting to connect resolves this issue. Your username and password are both CaSe SeNsItIvE, It is worth checking that you do not have your CAPS lock button turned on. Your username must include @usnetizen.com Microsoft Help on Error 691 for Windows 98 and ME Microsoft Help on Error 691 for Windows XP

Dial-Up Networking: Error 691 or 718 The computer you are dialing cannot negotiate a dial-up networking connection.
Verify that the customer is using the correct username and password. You may also want to go to My Computer, Dial-Up Networking, and the properties of SydCom. Click on the server type tab and make sure that log onto network isn't checked.

Error 718 [top]
The computer you are dialing in to cannot establish a Dial-Up Networking connection. Check your password, and then try again.

This could be cause by the following:
Username and password error.
Incorrect phone number

Try the following:
Retype your username and your password and change the access phone number if needed and try again.

Microsoft Article Q156986

Error 720: Dial-Up Networking could not negotiate a compatible set of network protocols you specified in the Server Type settings.
This error can occur if you computer has been incorrectly setup for access to the internet.

Dial-Up Networking: Error 720 Dial-Up Networking could not negotiate a compatible set of network protocols you specified in the Server Type settings.
Go to My Computer, Dial-Up Networking and the properties of the SydCom icon. Click on the server type tab and click on the TCP/IP settings button. Verify the TCP/IP settings and click ok. You will also want to verify that both Dialup Adapter and TCP/IP are installed in the network control panel. After verifying that the components are installed you will need to verify the settings and click ok.

Error 734: The PPP link control protocol was terminated.

According to the Microsoft Knowledge Base (Article 310431), this problem can occur when the "Include Windows logon domain check box is selected in the Options tab of the dial-up connection's Properties." It can also occur if your UDelNet ID or password is incorrect or if the dial-up connection has Require secure password selected. Microsoft suggests the following procedure to check for this error:

Click the Start button, point at Connect To, then select your UD dial-up connection.

Click Properties, then select the Options tab.

Make sure the checkbox next to Include Windows logon domain is not checked.

Select the Security tab.

Make sure that Allow unsecured password is the method selected in the dialog box labeled Validate my identity as follows: (Use the small down-arrow to select it if another option is selected.).

Click OK.

Microsoft Help for Error 734 for Windows XP.

Dial-Up Networking: Error 742 The computer you're dialing in to does not support the data encryption requirements specified.
Go to My Computer, Dial-Up Networking and the properties of the SydCom icon. Click the server type tab and make sure Require encrypted password isn't checked.

Error 745: An essential file is missing. Re-install Dial-Up Networking. This is failry strightforward in Windows 95 and 98. See the Microsoft Help on Error 745. This error is rare in Windows ME and XP.

Error 692 If Quicken 2000 is installed it will cause a modem error of 692. You may also see that reinstalling the modem will fix the problem till you reboot. The Fix is to remove the Download manager feature from Quicken.
The trick to perform this is Hidden.
You will need to select the menu option, edit, select internet options, it should pop up a form, select the connection tab, then hold SHIFT+ALT+DOLLAR SIGN "$", it will ask a question about disabling the background download manager, select the yes button.
Then close Quicken, open the device manager and remove the modem and reboot the machine to reload the modem drivers. --OR-- To disable Quicken Download Manager permanently, use the following procedure. This will disable background downloading for all sessions until the Quicken Download Manager is specifically re-enabled. Open the Quicken program.
In Quicken 99, point to Internet Connection on the Online menu, and choose Options.
In Quicken 2000 and 2001, point to Options on the Edit menu and select Internet Options.
This opens the Internet Connection Options window.
In the Internet Connection Options window, check the Don't use background downloading option.
Click OK.
Close the Quicken program.
Restart the computer. Check the status area of the Windows taskbar to make sure the red Q icon is not there. There are several reasons that this can happen. If someone picks up a telephone in your house and starts to dial while you are on line, you will likley be disconnected causing this error to appear. Our server employes an idle timeout to prevent users from accidentally staying connected when they are not using the service. You may have been reading and this was interpreted as idle time and you were disconnected by the server. This error can appear after being disconnected for no apparent reason. Random errors do occur and are often caused by poor line quality, static electricity, or electrical storms.
DUN Attempts to Dial When Windows Starts [top]

This could be caused by the following:

You have a program in the star up menu that is causing you to connect to the internet .
Possible Virus.
Incorrect registry key

Try the following:

Read this article

DUN wont remember your password [top]

This could be caused by the following:

Missing DUN file
Your .pwl list is damage
Rna.pwl file is damage
Client for Microsoft Networks is not installed
Password caching is disabled

Try the following:

Read this article

Errors without numbers

Another program is using the selected Telephony device. Try again after the other program completes. See this Microsoft Help File for Windows 98 and ME

The modem is being used by another Dial-Up Networking connection or another program. Disconnect the other connection or close the program, and then try again. See this Microsoft Help File for Windows 98 and ME Dialup networking was unable to complete the connection.

The modem is being used by another dialup networking connection. Close the other connection and try again. See this Microsoft Help File for Windows 98 and ME

Further help from Microsoft:

"The Page Cannot Be Displayed" Error Message When You Try to Start Internet Explorer
Explanation of error codes generated by Device Manager
Resources for Troubleshooting Internet Connection Sharing in Windows XP
How to troubleshoot TCP/IP connectivity with Windows XP (recommended for advanced users)
Windows 95 Dial-Up Networking Troubleshooting
How to Troubleshoot Modem Problems in Windows 98/98 Second Edition
How to Troubleshoot "No Dial Tone" Issues in Windows XP
Microsoft Windows XP - Troubleshooting network and dial-up connections
Resources for troubleshooting modem problems in Windows XP
"Error 691" or "Error 734" When You Attempt to Establish a Dial-Up Connection in Windows XP
"Error 734: The PPP Link Control Protocol Was Terminated" Error Message Occurs If You Try to Establish a Dial-Up Connection
Modem Automatically Attempts to Establish a Dial-Up Connection When You Start Your Computer or Start a Program
Troubleshooting missing network and dial-up connections icons
How to Troubleshoot Internet Connection Sharing Problems
"Error 721," "Error 678," "Error 691," or "Error 777" error message when you try to establish a dial-up connection after you upgrade to Windows XP
How to troubleshoot home networking in Windows XP
"Error 797" Error Message When You Attempt to Establish a Dial-Up Connection
How to Troubleshoot Modems in Windows Millennium

For Remote Access Service (RAS) please check :
http://support.microsoft.com/support/kb/articles/q163/1/11.asp
The above is a general list of the RAS error codes and meanings but differs from those displayed by DUN.

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