The Conexant RD01-D850 PCI Data Fax Modem Line Expansion Card is a green PCI card that can expand your modem line. With a maximum downstream data transfer rate of 56Kbps, this fax modem is perfect for home networking and connectivity. This untested modem line expansion card is a great addition to your computer or tablet and can provide you with a reliable and fast connection. The Conexant brand is known for its quality products, and this modem line expansion card is no exception. Expand your modem line with the Conexant RD01-D850 PCI Data Fax Modem Line Expansion Card.