Sunix product page: SER5356A SUNIX SER5356A PCI-104 RS-232 serial communication board combines small size, industrial grade construction and reliability specification, plus perform the functions most commonly need in embedded application. With SUNIX SER5356A PCI-104 board, users can add 4 serial ports to their system, allowing them to use serial devices further. Each port offer data transfer rate up to 921.6Kbps with built-in 128byte FIFO buffer to give you maximum system performance and efficiency. SER5356A PCI-104 modules use as smart stacking bus design, they avoid the costs and bulk associated with backplanes or card cage. It works with PC/104 -plus CPU boards that accept the PCI-104 expansion interface, and comes with DB9 or DB25 connection cables are available as options to meet users' varied connection requirements. Features * Expands 4 independent RS-232 serial ports with communication speeds up to 921.6Kbps. * High speed SUN1999 16C950 compatible UART controller on-board. * Compliance with PCI 33MHz Ver. 3.0/2.3/2.2./2.1 specification. * Ideal for PCI-104 and PC/104+ embedded systems * On-chip hardware auto flow control to guarantee no data loss. * Built-in 15KV ESD protection for all serial signals meets IEC1000-4-2 standard. * Plug-n-Play, I/O address and IRQ assigned by BIOS. * Low profile bracket design idea for slim or portable PC. * Certified by CE, FCC, RoHS, and Microsoft WHQL approval. * Support Microsoft Windows, Linux, and DOS.