Works with laptops that do not have an onboard dial up modem.
Rosewill RNX-56USB Modem Conexant Hardware Based 56Kbps USB (Plug & Play) V.92 Data/Fax/TAM - Windows7 Ready
Interface: USB
Cable Interface: RJ11 port
Data mode capabilities ITU-T V.92 data mode with receive rates up to 56Kbps and transmit rates up to 48Kbps ITU-T V.90 data mode with receive rates up to 56Kbps and transmit rates up to 33.6Kbps ITU-T V.44, V.42bis and MNP 5 data compression ITU-T V.42 LAPM and MNP 2-4 error correction ITU-T V.34, V.32bis