DSL service in Illinois is available in most areas that are within a specified distance from a provider's equipment. DSL is much faster than dial-up, with download speeds ranging from 256K per second to 24MB per second depending on the type of technology and distance from the provider's central office.

DSL, short for Digital Subscriber Loop or Line, is a high-speed Internet connection over telephone lines. It uses a higher frequency than voice transmission so you can use your phone and access the Internet at the same time.

DSL is set up by installing a DSL modem or router that connects to a phone jack. To prevent feedback and noise, a filter is placed on the phone line to block out the high frequencies used for data transmission.

There are plenty of Illinois DSL providers. To get an idea of which one is right for you:

1. Compare the costs of Illinois DSL service.

2. Check out support options and service level agreements.

3. Look at other business services that are included in the DSL package.

Action Steps
The best contacts and resources to help you get it done

Browse directories of DSL service in IL

To start your DSL search, find out if your local phone company provides DSL. Illinois is home to many phone companies that provide DSL. Browse directories of independent providers of DSL in IL to compare prices and services.

I recommend: Use the Illinois Telecommunications Association list to find phone service providers in your area. Find DSL providers by municipality on the ISP Guide. Compare monthly rates to your local provider.

Check out national providers of DSL services in Illinois

A large national provider of DSL can offer excellent customer service and trouble-free connections. Some offer additional services, like web hosting and email addresses, as part of the package.

I recommend: AT&T is one of the nation's largest providers of telecommunications and DSL services. Covad is an independent telecom that offers telephone lines as well as DSL and other Internet services. CenturyTel provides DSL to small-to-mid-size cities throughout the United States.

Look at smaller DSL service providers in Illinois

A smaller local ISP may offer lower costs and a more personal touch than the larger telecoms. You may be able to bundle services together to get a good deal.

I recommend: WOW! is a small national ISP that provides bundled services to business customers. Consolidated Communications offers service in Illinois, Texas and Pennsylvania. They feature 24-hour tech support and 10 email accounts. A5 offers a variety of service options and connection speeds.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  Keep in mind that many Illinois broadband providers do not own the phone lines and have limited control over system outages and service levels. While they may provide more competitive pricing and better business packages than the major telecoms, it can take longer to resolve service issues.
• •  Find out whether the provider offers a free router with its service. DSL can be routed across your network, but speed will be reduced as more people use the connection. Many DSL routers include firewall and routing services. Consider upgrading your router if it doesn't meet your needs.