Brainboxes PX-335 interface cards/adapter

PCI Express Card providing four RS422/485 serial ports. Up to 921,600
data transfer rates and the 128 byte deep transmit and 128 byte
receive FIFOS, coupled with 1Mbit/s line drivers deliver uncompromising
performance on your laptop/PC.
PCI Express is the latest standard in PC connectivity. PX-335 - Low Profile
version; PX-346 - Standard Profile version
With Brainboxes industry renowned Lifetime Warranty and Lifetime Support!
- Fits on x1, x4, x8 or x16 PCI Express expansion slot
- 128 Byte FIFOs with user definable trigger level
- 921,600 Baud, true megabaud line drivers
- Drivers for all popular operating systems
- Sample Programs, Test & Terminal software - all with source code.