Types of Access Networks: DSL
Explore how Digital Subscriber Line or DSL works as an access network technology using existing telephone lines. Understand the role of ISPs, the function of modems converting digital and analog signals, and the channel divisions in DSL. This lesson helps you grasp the basics of DSL including Asymmetric and Symmetric DSL types and their bandwidth characteristics.
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Now that we know what access networks are, let’s look at some common types.
Digital Subscriber Line: DSL
A Digital Subscriber Line or DSL uses the existing groundwork of telephone lines for an Internet connection. DSL connections are generally provided by the same company that provides local wired phone access.
Internet Service Providers
An ISP is just the company that provides end users with an Internet connection. For instance, AT&T and Verizon are ISPs. So the telephone company or telco is the Internet Service Provider or ISP in the case of DSL!