Wide IRQ selection for each port: IRQ 3, 4, 5, 6, 7, 9, 10, 11, 12, 15. Supports 32-bit/64-bit Windows 2000/XP/Vista/7 and Linux. High speed transmission up to 500 kbps
RS-232, RS-422, RS-485 or current-loop interface. 16C550 UART with 16-byte FIFO. Supports 4-wire or 2-wire operation for RS-422/485. Transmission speeds up to 921.6 kbps
4/8 RS-232 or RS-422/485 serial ports. Transmission speeds up to 921.6 kbps. Supports 2 wire or 4 wire operation. Automatic RS-485 data flow control or RTS control.