ZyXEL USB Omni56K Plus: It is the ideal solution for dial-up Internet access with powerful data, fax and voice functions. It supports ITU V.92 protocol with the highest speed of 56Kbps downstream rate and 48Kbps upstream rate, which also complies with most international standards. The Ã???Ã??Ã?Â¢??Bus PoweredÃ???Ã??Ã?Â¢?? feature eliminates the need of an external power supply, enhancing its compact and lightweight space saving design.