Add two RJ-11 ports to your computer through USB (Universal Serial Bus), for dial-up Internet & fax communication. This USB (Universal Serial Bus) to 2-port 56k modem lets you add two RJ-11 jacks to your computer that you can use for dial-up Internet access & external fax modem support. It's almost impossible to find a modern computer with a dial-up modem, even though modems are still commonly needed for fax communication & rural Internet connections at both the home & the office. This two-port modem gives you the freedom to upgrade your existing computer or server & still be able to send or receive fax communications & connect to the Internet using the same device. This hardware controller-based modem saves system resources & minimizes load on your computer's CPU, using on-chip processing to deliver dial-up access without taxing your computer performance. Plus, with support for transfer rates up to 56 Kbps (data) & 14.4 Kbps (fax), & compatibility with the latest transmission standards (V.92, V.90, etc.), this versatile USB (Universal Serial Bus) modem can be used as a backup Internet connection, or in rural areas where broadband connections are not available. The modem also supports both Windows & Mac OS platforms, providing the compatibility needed for true convenience. To ensure portability the USB (Universal Serial Bus) modem features a compact, lightweight design & is powered through the USB (Universal Serial Bus) host connection. This portable design makes this modem the perfect accessory to carry with your laptop computer, fitting easily into your laptop bag or carrying case.