dial-up       
adjective [ before noun ] uk/ˈdaɪ.əl.ʌp/ us/ˈdaɪ.əl.ʌp/
 (计算机)拨号上网的
Dial-up computer systems, devices, and internet services use a phone line to connect them.
  a dial-up connection 拨号接入 
 dial-up access/networking 拨号上网 
 a dial-up account/modem 拨号账户/调制解调器