PTI-401 is a unique modem that relies on software without the need for a modem processor. With main features such as compact size, higher functionality and easy upgradability, the PTI-401 also comes featured packed with ITU-T V.92, ITU-T V.90 and K56 Flex auto-negotiation with auto-fallback to ITU-T V.34 and below. Software upgrades are made simple with a user-friendly "Upgrade Utility", making PTI-401 easy for end-users to keep update with new communication technology.

Support ITU-T V.92 standards with receive data rates up to 56Kbps and downstream data rates up to 48Kbps.
Support ITU-T V.90 standards with receive data rates up to 56Kbps and downstream data rates up to 33.6Kbps.
Support V.42bis and MNP5 data compression.
Support ITU-T V.42 LAP-M and MNP 2-4 error correction.
Fax mode with send and receive data rates up to 14.4Kbps.
Support Group III Class 1 commands.
Support PnP specification.