Serial - 33.6 kbit/s - ITU-T V.34plus, ITU-T V.34, ITU-T V.32bis, ITU-T V.32, ITU-T V.22bis, ITU-T V.21, ITU-T V.42bis, ITU-T V.34bis, ITU-T V.27ter, ... Modulation - 14.4 kbit/s Fax Transmission Data Rate

Serial - 56 kbit/s

USB 2.0 fax modem adds data & fax support to computer/laptop; For faxing POS & rural internet - Hardware based dial-up adapter/dongle - External 56K Modem | Data Fax |USB Type A |RJ11 Telephone Jack| 56 Kbps Down Data |14.4 Kbps Fax V.92

Serial - ITU-T V.34, ITU-T V.32, ITU-T V.22 Modulation - 33.6 kbit/s Fax Transmission Data Rate

Serial - 1 x Modem (RJ-11) - 115.2 kbit/s

New - 33.6 kbit/s - ITU-T V.34plus, ITU-T V.34, ITU-T V.32bis, ITU-T V.32, ITU-T V.22bis, ITU-T V.21 Modulation

New

PCI - 1 x RJ-11 Modem - 56 Kbps

PCI Express x1 - 56 kbit/s - ITU-T V.92 Modulation

57.6 kbit/s - ITU-T V.42bis, ITU-T V.32bis, ITU-T V.33, ITU-T V.32, ITU-T V.29, ITU-T V.22bis, ITU-T V.22, ITU V.17, ITU-T V.21, ... Modulation - 19.2 kbit/s Fax Transmission Data Rate

56 kbit/s

USB - 56 kbit/s - EIA 578 Class 1, ITU-T V.17, ITU-T V.29, ITU-T V.27ter, Group 3 Fax Technology - ITU-T V.92, ITU-T V.90, ITU-T V.34, ITU-T V.32bis, ITU-T V.22bis, ITU-T V.22, ITU-T V.23, ITU-T V.21 Modulation - 14.4 kbit/s Fax Transmission Data Rate

USB - 1 x Modem (RJ-11) - 56 kbit/s - ITU-T V.17, ITU-T V.27ter, ITU-T V.29, ITU-T V.21 Fax Technology - ITU-T V.92, ITU-T V.90, ITU-T V.32, ITU-T V.32bis, ITU-T V.34 Modulation