DSL Modems

Published March 30, 2010

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Overview

A Digital Subscriber Line (DSL) is a type of broadband Internet service. It provides faster Internet access and is exclusively designed for usage with high-speed connections. DSL connections use frequencies from 25 kHz to above 1 MHz for Internet access. You can talk on the phone and access the Internet simultaneously, since DSL modems use a filter to keep data signals secure and to prevent interference with regular phone calls. A DSL modem can be connected to the computer through an Ethernet port or through a Universal Serial Bus (USB).

You can set up your Local Area Network (LAN) to access the Internet through the same DSL modem using Ethernet cables. Modems can range in cost between $29 and $1,399, depending on your bandwidth and technology needs. An Internet service provider (ISP) may rent out or waive the cost of a modem.

Benefits

DSL modems provide a faster Internet connection that allows downloading of images, videos, and other large files at rapid speeds. You can connect to the Internet quickly, you won't experience busy signals, and you won't have to dial a local telephone number. DSL uses your existing phone line for Internet access. Because DSL and phones operate through different signals, you can make and receive calls when you are online.

How It Works

Your DSL modem gives you the technology to access the Internet through a DSL service provider. First, you should select a service provider. Your ISP might give you a DSL modem, or you will need to purchase your own. Make sure that your modem comes with a power supply, and Ethernet cable. If you have multiple computers or a network, you will also need a router. One computer can access the Internet directly through a DSL modem.

There are two forms of DSL: an Asymmetric Digital Subscriber Line (ADSL) and a Synchronous Digital Subscriber Line (SDSL). DSL technology allows both upstream and downstream traffic. Small companies and home users generally use ADSL for Internet access. ADSL typically has slower upstream speeds and faster downstream speeds. Larger companies prefer SDSL since they need to send and receive large amounts of information. SLS upload and download speeds are the same, and with ADSL, download speeds are much faster. Your overall speed will vary based on the plan that you purchase.