Best Connectivity SD-PCI15024 PCI One Serial Port Card with SystemBase Chipset SB16C1052PCI I bought 2 that never worked with Linux

I bought 2 that never worked with Linux, (What's this?) I bought 2 of them for external serial modems and neither of them ever worked in Ubuntu 11.10 systems. The vendor never replied to my attempts to contact them. Thankfully Amazon took them back and gave my money back.
Perfect for 1, (What's this?) If you only want to use one console cable, this one is perfect. I use it to connect to cisco switches routers and asa appliances. If you only need one connection, go with this. Otherwise, I would say to go with the dual console.
It Works on a Dell 4400 with XP Pro SP3, (What's this?) It works fine with no issues on Dell 440 WinXP Pro SP3. Using it to print to Automated Packaging Systems Precision Printers. I previously tried the Startech brand and they did not work.

PCI one serial ports card with SystemBase Chipset SB16C1052PCI. Easy Plug & installation automatically selects IRQ and I/O address. Fully compliant with PCI Local Bus Specification Revision 2.3. Supports PCI power management. Supports PCI IRQ sharing feature, saves valuable resources for other add-on cards. Compatible with industrial standard 16C550 UART. On-chip 256-byte depth FIFO in Transmit & Receive paths of each port. Fast data rate up to 115.2Kbps on each port. Supports hardware and software flow control. Supports 5-, 6-, 7-, 8-bit serial format. Supports Even, Odd, None, Space & Mark parity. Supports 1, 1.5, or 2 Stop bit operation. Hardware: Computer with PCI slot.