This is a brand new, factory sealed USRobotics 56K Faxmodem, Model 5686E. Perfect for legacy systems, industrial applications, or anyone needing reliable dial-up internet and fax capabilities. This external modem supports V.92 and V.90 ITU standards, offering faster email attachments, quicker internet connection, and the ability to screen incoming calls while online. It features a built-in processor for smoother audio/video streaming and USRobotics Advanced Line Probing technology for enhanced reliability and speed. The modem also supports V.80 video conferencing, V.42bis/MNP-5 data compression, and V.42/MNP 2-4 error control. It's compatible with ITU and Bell standards, supporting speeds up to 56 Kbps downstream and 1200 bps upstream. The package includes the 56K Faxmodem, AC power adapter, RJ-11 phone cord, Quick Installation Guide, and Installation CD-ROM. Ensure your system meets the minimum requirements, including an available RS-232 serial port (cable not included).