What Are DSL Modems?

A Digital Subscriber Line (DSL) modem connects your computer to an Internet Service Provider (ISP) to provide broadband Internet service from 128 kilobytes per second (Kbps) to 3000 Kpbs. The modem connects to ordinary phone lines through a phone jack, preventing the need for a technician to install a separate jack. The ISP typically provides both modem, software, cables and instructions so you can install it yourself.

DSL Cable

A DSL modem connects to your computer through a special DSL cable. Though it looks like an ordinary phone cable, this cannot be used in its place.

Filter

When using line splitter to share one phone jack between your DSL and phone connection, install a filter on the phone cord. Otherwise, the signals will interfere with each other.

Renting

The DSL modem provided by your ISP costs a monthly charge of about $5. You can upgrade this to a later model or have the ISP fix it in case of problems for free. However, it may not have all the latest features.

Buying

Buying a DSL modem saves the monthly rental charge and offers you a choice of options such as wireless routers and multiple connections. However, you need to diagnose and fix any hardware problems or consult an expensive repair shop.

Routers

To connect multiple computers to the DSL modem, you need a router that can be either wired or wireless. Combined modem routers are expensive to buy but may be available for rent from your ISP at the higher service plans.

Manufacturers

Many companies produce DSL modems such as D-Link, Linksys, Netgear and U.S. Robotics.