Dell 3333/3335dn Mono Laser Printer - Manual (Page 132)

Connecting to a computer with a modem
Connect the printer to a computer with a modem to send faxes from the software program.
Note: Setup steps may vary depending on your country or region.
1 Connect one end of the telephone cable that came with the printer to the printer LINE port .
2 Connect the other end of the telephone cable to an active analog telephone wall jack.
3 Remove the protective plug from the printer EXT port .
4 Connect your telephone to the computer telephone jack.
Faxing 132