A DSL 모뎀 is a device that connects your home or office to the internet using a Digital Subscriber Line (DSL) technology. It converts digital data from your computer into a format that can be transmitted over telephone lines, allowing for high-speed internet access without interrupting phone service. Typically, a DSL 모뎀 connects to a router, enabling multiple devices to access the internet simultaneously. It requires a DSL service from an internet service provider (ISP) and is commonly used in residential and small business settings for reliable internet connectivity.