Look at the pic. Qwest is now centry link
Oh, yeah, that totally clears everything up.
Anyway, to switch from DSL/Broadband/cable to Dial-up, follow these simple steps:
1. plug a telephone jack into the modem on the computer
2. change network setup to usethe dial-up adapter (modem) instead of your NIC.
If the real question is that you want to connect a computer that only has a modem to broadband, you can't. install a NIC.