Life with inteRnet, we are the inteRnet.

where internet makes your life easier © 2007 – 2012


• What are the recommended COM settings for my modem?
1. 115.2 kbps terminal speed
2. 8 bits
3. 1 stop bit
4. no parity
5. RTS/CTS flow control
6. The extra initialization command will be: +cgdcont=1,”ip”,”gpinternet”

• I got this error message “No Dial Tone”
Check that you have plug your telephone line into your modem
Check that the telephone line is plugged to the correct jack on your modem. Many modems have two jacks: one for the telephone line and the other for a telephone handset. These are usually indicated on the modem jacks itself
Other device on the same telephone line (e.g. a telephone answering machine) is off-hook. Make sure that all other devices are on-hook.

• When I tried to dial in, I got this error message: “Modem Not Responding”
Make sure the modem is properly connected and switched on
If you have an external modem, power cycle it by turning it off for a minute and then turn it back on again
Reboot the computer if you have an internal modem
Step the baud rate (port speed) down from to lower speed, attempting a connection at each speed
• I got this error message “Error 691: …cannot established a Dial-up Networking connection…” or Error 691: Access denied because username and/or password is invalid on the domain”
Users with student accounts should only dial-up to NTURAS using dial-up number 67946301. Accessing NTURAS dial-up using dial-up number 67935877 will cause the above error
You might have keyed in a wrong password and password is case sensitive. To verify that your password is correct, you can check your user password by accessing Web mail from any of your ISP

• I got this error message “Error 629: The port was disconnected by the remote machine”
Verify that you are typing your domain, username and password correctly
Configure your dial-up connection to NTURAS to accept any authentication, including clear text
If phone line noise or other interference is a problem, lowering modem connection speed may help you establish connection

• I got this error message “Error 633: The modem is not installed or configured for Dial-Up Networking”
Check your modem configuration by double-clicking the ‘Phone and Modem Options’ icon in Control Panel. Select the ‘Advanced’ tab to see a list of telephony providers
The Telephony Application Programming Interface (TAPI) service provider entry in the registry is missing or has been altered
The Telephon.ini file is missing or damaged .


WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the “Changing Keys And Values” Help topic in Registry Editor (Regedit.exe) or the “Add and Delete Information in the Registry” and “Edit Registry Data” Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.

To resolve this issue if the TAPI service provider entry in the registry is missing or has been altered, use Registry Editor to view the following registry key:


\Telephony\ProvidersModify the value of the ProviderFilename0 value to “TSP3216L.TSP” (without quotation marks), save these changes, quit Registry Editor, and then restart your computer.To resolve this issue if the Telephon.ini file is missing or damaged, follow these steps:
1. Click Start, point to Find, and then click Files Or Folders.
2. In the Named box, type telephon.ini, and then click Find Now.
3. If you do not find the Telephon.ini file, skip to step 4. If you do find the Telephon.ini file, right-click it, click Rename, type telephon.old, and then press ENTER.
4. Quit the Find tool, click Start, click Run, type tapiini.exe, and then press ENTER.
5. Restart your computer.

• I got this error message “Error 645: Dial-Up Networking could not complete the connection to the server. Check your configuration and try the connection again”
Make sure that you key in the correct username and password
Clear the ‘Require encrypted password’ check box that is enabled on ‘Server Types’ tab

To resolve this behavior, follow these steps: 1. Verify that your user name and password are correct. If this resolves the issue, skip all the remaining steps. Click Start, point to Programs, point to Accessories, point to Communications, and then click Dial-Up Networking.
1. Right-click the icon for your connection, and then click Properties.
2. For Windows 95, 98 and 98 Second Edition:Click the Server Types tab, click to clear the Require encrypted password check box, and then click OK.For Windows Millennium Edition (Me):Click the Security tab, click to clear the Require encrypted password check box, and then click OK.• When you attempt to dial into a Windows 98-based computer that has been configured as a Dial-Up Networking server, you may receive the following error message “Error 650: The Remote Access server is not responding”
This issue can occur if the Dial-Up Networking server contains a US Robotics INT PNP modem that is using the drivers included with Windows
To resolve this problem, contact 3Com to inquire about the availability of the latest drivers for your specific modem

• When I attempt to connect to a remote computer by using Dial-Up Networking, I receive the error message “Error 745: An essential file is missing. Re-install Dial-Up Networking”
This issue can occur when a Dial-Up Networking dynamic-link library (.dll) file is missing or damaged• Why do I sometimes get abruptly disconnected?
If you have a Call Waiting feature, it can interfere with remote connections and file transfers. To avoid this problem, you may have to temporarily disable Call Waiting
You may have been disconnected due to a data transfer error. This can occur if data is either being received too slowly or too fast. Try using a lower port speed in the modem properties in the Modem Option in Control Panel. If you have a 28.8 or higher modem, choose the 57600 as the maximum speed. If you have a 14.4 modem choose the 19200 as maximum speed
Check the connection between the RJ-11 phone outlet and the modem. Verify that the connection is firmly plugged in and well connected
Seasonal High’s and Lows: The weather can play a role in the line quality. Heat and tension can change the physical properties of the lines, which in turn may lead to an increase or decrease in line noise. The carrier will be dropped before they re-train (automatically adjust the transmission rate based on line-quality) to any speed below 14.4kbps Modem Incompatibilities

• It takes a long time to download files, web pages, download mails whenever I am on the network
This can be caused by several different factors:
Your computer hardware too plays a part in the overall performance on the net:
Having a high end PC but a slow modem drastically reduce the performance of one’s surfing. For example, if you have a 14.4 modem it will take in some cases quite a while for files to download. This is especially true with web pages that have graphics as those big files must be downloaded.
If you have an external modem, it may be that the UART chip on the com port that is an older one and it will not allow for the higher speeds. The UART needs to be 16550 chipset and below this number will cause the modem to run slowly.
The server that you are trying to access may be slow or overloaded. They may be experiencing heavy traffic and thus there is a delay to them fulfilling your request for a file service.
• What if I did not configure my web browser to use proxy?
Explicit Proxy configuration on the web browser is now not required. Internet web browsing should be immediate once dial-up connectivity is established.
• Why do download speeds differ from connection speeds?
There are a number of factors that can affect this:

1. The actual location of the site you are connecting to or downloading from
2. The size of the link you are connecting to the Internet
3. The speed of the host server
The number of traffic on the Net
• After I have established dial-up connection, why am I not able to surf Internet?
There are so many possible reasons but the possibilities are
The host base Firewall such as Windows ICF or Zone Alarm is blocking the outgoing or returning web traffic
The web browser’s system files might be corrupted therefore preventing web surfing
Certain computer viruses, worms or spyware might cause damage to the files or OS system registry associated to the web browser

Dial-up user must perform basic trouble-shooting to ascertain that the problem of unsuccessful web browsing is not due to the computer or the web browser. The results of the following trouble-shooting will assist the CITS helpdesk staff\Administrator to isolate the source of the problem speedily.


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