Transmission Line: RJ11 / RJ12; 56K data/fax modem with USB interface * Compatibility: AT and extended AT command set; Complies with V.17, V.29 and V.27ter group 3 fax protocol; Complies with V.90, V.42/V.42bis and MNP5 protocols; Conexant chipset * Supports auto dial, tone, pulse dialing, automatic answer and retrain; Supports caller ID, distinctive ring detect and automatic format/speed sensing; Supports data, fax/voice call discrimination, single configuration profile stored in host and call forward/fall-back; Supports Microsoft Windows 7, Windows Vista 32bit, and Windows XP * Up to 56Kbps data download, 48Kbps data upload and 14.4Kbps fax communication * Color: Black