A modem is typically used to send digital data over a phone line. The sending modem modulates the data into a signal that is compatible with the phone line, and the receiving modem demodulates the signal back into digital data. There are more then one devices that can be attached to the phone line long with modem. New phone equipment such as Fax Machines, Answering Machines, Additional Extensions or Home Networking equipment may be added to your phone connections. Often these devices of one of these devices create issues for your dial up connection. The problems can range from additional noise on the phone line or failing connection.

Main cause of this kind of problems is improper installation of one of the devices. If these devices are added to same phone line that you use to access internet then it becomes very important to see that each device is installed properly. Even the installation of additional telephone lines run through various parts of the house can be causing problems if they were not correctly installed.

Testing for these problems can be very easy. You may just temporarily remove devices leaving one and removing other equipment to see if the issue persists. If the issue has started after recently added device then remove that device first and see if the disconnect or noise problems gets rectified. One by one remove the application from the assembly and see if the conditions improve. If a particular device is creating issue then it will be revealed by this method. You will need to reinstall it properly. If the issue persists then there is a possibility that the device has gone faulty. When testing for problems by disconnecting other equipment, it is very important to remember that the power supply may have to be unplugged but the phone cord attached to the connection jack should be temporarily removed.

This type of problems also includes line equipment outside your location. It may also happen that in some locations where the telephone company has not upgraded their equipment and you may have telephone line that has a dial up connection and other phone devices installed. Here the old phone line will not support high speed dial up connections very well or even at all.

On the other hand, if the telephone company does add some device to the current set up then it may also cause problem. For example, if a phone company is running low on phone lines it may decide to install a device called a SLC. This device basically split up a phone line channel into two separate channels in order to accommodate the growing need for phone lines in your area. This will have adverse effect on your dial up connection.

In this case, if you could be getting good speed consistently and one fine day they could install one of these SLCs into your local telephone lines setup doubling their available phone lines but effectively cutting your bandwidth in half.

Taking precautions and maintaining your equipment constantly will save you from most of the troubles.

More Useful Information on Free Dialup Connections, Internet, Broadband, Modems..

1. ADSL (Asymmetric Digital Subscriber Line) FAQ's
2. What is ADSL (Asymmetric Digital Subscriber Line)?
3. Choosing Correct ISP.
4. Data Transfer in Dialup Modem.
5. Dialup Connection Modem Issues.
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16. Minor Issues Causing Dialup Connection Failure.
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20. Non Dialup Connections.
21. Premium Rate Dialup Connection Fraud.
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