A Digital Subscriber Line (DSL) modem is a device that connects a computer to an Internet service provider (ISP) in order to access the internet. It is a type of modem that uses telephone lines to transmit data over a digital connection. This type of modem allows for faster speeds than traditional dial–up modems.

The DSL modem works by using two separate channels, a upstream and a downstream. The upstream channel sends data from the computer to the ISP while the downstream channel sends data from the ISP to the computer. This allows for faster speeds than traditional dial–up modems.

Since the modem uses telephone lines, it requires a filter to block out noise and interference. This filter is called a DSL splitter and is usually installed by the ISP. DSL modems are easy to install and configure. They are also typically reasonably priced, making them a popular choice for home internet users. DSL modems are also more reliable and secure than dial–up modems.

Overall, a DSL modem is a great way to access the internet quickly and reliably. It is a cost effective solution for many home users and provides fast speeds for surfing the web, streaming videos and playing online games.