Add an rs 232 serial port to your pc through a pci expansion slot the pci1s550 16550 serial pci card can be installed in a pci slot to add one rs232 serial port a cost effective solution for connecting any new serial device or old legacy serial device with data transfer rates of up to 1152 kbps perfect for connecting serial modems pos devices pdas digital cameras printers isdn terminal adapters and more to your system the 1 serial port pci card supports irq sharing and operates f