A dial-up is a connection that's established using a modem. To make the dial-up connection, the modem must connect to an active phone line that is not in use. When connecting, the modem picks up the phone and dials a number that's attached to another computer. After the connection is made the computer can check e-mail, browse the Internet, and share files.
What does a dial-up connection sound like?
If you did not grow up on a dial-up Modem or you're nostalgic, you can listen to a Modem connecting to the Internet in the below sound file. Each time someone wanted to connect to the Internet this is the noise their Modem would make.
The dial-up connection today
Today, with multimedia and bigger web pages on the Internet most users have an unenjoyable time browsing the Internet using a dial-up connection and try to use other options. Most users who have the available option use some form of broadband connection, which allows a much faster download and upload.