di·al-up 
(dīəl-ŭp′, dīl-) or dial-in (-ĭn′)
(dīəl-ŭp′, dīl-) or dial-in (-ĭn′)adj.
Of or relating to a connection to the internet or other network that is obtained by dialing a telephone number: My dial-up connection was interrupted by call waiting.