Add two rj 11 ports to your computer through usb for dial up internet and fax communication this usb to 2 port 56k modem lets you add two rj 11 jacks to your computer that you can use for dial up internet access and external fax modem support its almost impossible to find a modern computer with a dial up modem even though modems are still commonly needed for fax communication and rural internet connections at both the home and the office this two port modem gives you the freedom to u