3. Serial Board- 4 Port RS232. Universal PCI serial board provides 4 industry standard RS232 serial COM ports in a single PCI slot. 4 Port RS232 PCI 3.0 64 byte Tx ; 64 byte Rx FIFOs Data rate up to 115,200 baud DB9 connector ( ; 481-1191 481-1191 ) DB25 connector ( ; 481-1652 481-1652 ) Drivers for all popular operating systems Lifetime warranty and support