A widely used method of accessing the Internet. A dialup connection lets a user dial into an Internet Service Provider ( ISP) using a regular phone line to connect one computer to another via a modem; also known as a PPP connection.
a temporary connection established using a modem to dialup the number (over telephone line) for a line linked to a remote computer
A Dialup Connection is a common method of accessing the Internet that uses phone lines to connect computers via modem. Your ClassNET account is a Dialup account.