HP Programmable Serial Interface Card serial adapter - 2 ports

The PCI dual-port programmable serial interface (PSI) card consists of 2-port serial interface hardware that features a flexible physical connectivity interface (RS-232C/V24, X.21/V11, RS-449, V.35, or RS-530 standards). Cable types are automatically recognized. It supports the X.25/LAP-B protocol and the Frame-Relay/LAP-F protocol, allowing HP 9000-to-HP 9000 communication, as well as HP 9000 to other systems (HP or non-HP) over packet data networks or leased lines. This is achieved through the use of HP X.25/9000 Software or HP Frame-Relay/9000 Software. The package includes two RS-232C cables (3m).