Actiontec External 56K V.92 Modem, All standards Supported (V.44, 56K Flex, V.90 and V.92) Controller based meaning all processing is internal, so your computer is free to speed through other functions Supports V.44 standard, a protocol that delivers data rates up to 120% faster than previous models (your ISP must provide V.44 support for increased bandwidth) Memorizes your phone line's characteristics, and streamlines processes to reduce connection time. Adjusts speed to line conditions for optimal connection strength Simultaneous support of V.92 protocol and popular V.90 and K56flex standards Compatible with all service providers