Axxon 4 Port RS232 1 Megabaud PCI Controller Card

The 4-Port RS232 PCI Controller Card from Axxon connects to a 3.3V PCI or PCI-x slot and, using the included Quadplex HD44M-to-4x DB9 cable adds four RS232 ports to your computer. It's designed with a low-height mounting bracket and comes with an optional standard-height mounting bracket.