Black Box IC140C-R2 RS-232/V.24 2 port PCI Card, 16650 UART

These serial host adapters provide 2, 4, or 8 PCI-bus links for communication servers, point-of-sale (POS) systems, and other data-collection devices. Each card has two or more UARTs (universal asynchronous receiver/transmitters), which are integrated circuits that convert bytes from the computer bus into serial bits for transmission.Integration problems are a thing of the past with these adapters, since they support all PCI interrupts, giving you more IRQs to choose from when installing. What's more, the adapters support standard data rates and quad data rates.