Sigma Siig JJ-P04621 IO1876 Quartet Serial 550 PCI Adapter interface cards/adapter

Sigma JJ-P04621 IO1876 Quartet Serial 550 PCI Adapter - 4 x D-Sub (DB-9) RS-2 Features

- Conforms to PCI v2.1 Plug and Play
- Full support for DOS and Windows-based software
- Improves I/O access speed up to 8 times faster than ISA serialI/O card. Reduces CPU load and improves system performance
- IRQ sharing feature eliminates IRQ conflicts
- Enhanced 128-byte (via 16850 UART)/32-byte (via 16650 UART)/16-byte (via 16550 UART) Transmit and Receive FIFO buffers achieve larger data block transfer, reducing CPU load dramatically, especially under Windows multitasking environment
- Advanced Transmit and Receive FIFO counters reduce the CPU's interrupt service time by as much as 32% (16850 UART only)
- Automatic RTS (Request-To-Send) hardware data flow control increases receive data throughput and prevents data loss (16850 UART only)
- Four high-speed serial ports (9-pin) support baud rates up to 920Kbps per port
- Ideal for high-speed serial port devices including ISDN terminal adapters, 56K V.90 external modems and more