AT-2711FX Fast Ethernet Fiber Network Interface Card design gives you the maximum possible bandwidth and bus efficiency, other benefits are, capability and Low Power Consumption. For the current customers who are using Allied Telesis 100Mbps Fiber cards, and want to upgrade their systems to PCI-Express, AT-2711FX Fast Ethernet Fiber Network Interface Card is the ultimate solution.The customers can continue using their existing 100Mbps Fiber network without adding any more new equipment. Its a single pack.