dial-up

dial-up
ˈdial-up adjective [only before noun]
relating to a telephone line that is used to send information from one computer to another:
    a dial-up connection
—dial-up noun [countable]

dial-upBrE /ˈdaɪəl ʌp/ 🔊NAmE /ˈdaɪəl ʌp/ 🔊 adjective [only before noun] using a telephone line and a modem to connect your computer to the Internet 拨号上网的