properties

• Four EIA RS-422 ports for asynchronous communications.
  
• Suitable for XENIX/UNIX (SCO, AT&T, Interactive, UNIXWARE), MS/DOS, WINDOWS/NT, WINDOWS/95, OS/2, MS/WINDOWS, PICK, CONCURRENT DOS, QNX, PROLOGUE, MUMPS, ... etc.
  
• IBM PC/AT, PC/386, PC/486, Pentium hardware compatibles.
  
• Interrupt selectable. (IRQ2 - IRQ7)
  
• I /O address selectable.
  
• AST FourPort/XN compatible.
  
• COM1 and COM2 compatible.
  
• Auto-detect 16450 or 16550 or 16650 chips on board.
  
• Baud rate up to 56K for normal speed board and up to 460K for high speed board.
  
• Maximum of 3000 ft transmission distance.

description

The Alpha4/2 port RS-422 adapter provides four asynchronous serial communication ports, which link the computer and serial peripheral devices such as terminals, modems, serial printers, plotters, ... etc. A programmable baud rate generator allows operation from 50 baud to 56K baud and up to 3000 ft transmission distance.