StarTech.com 2-Port External USB Modem - 56K Hardware Based Dial-up Interent Fax Modem Add two RJ-11 ports to your computer through USB, for dial-up Internet and fax communication Compatible with USB computer systems dual modem 2-port RJ-11 / Fax modem / Dial up Internet modem / 2-port modem / 56K dual port modem / 2x RJ11 modem / USB Modem Turn a PC into a fax machine, capable of sending and receiving faxes -Compatible with V.17, V.29, V.27, V.21 Ch 2, EIA/TIA 578 Class 1 and T.31 Fax Class 1.0 fax modes Use one port for 56K Internet and the other for fax communications