资料来源 : Free On-Line Dictionary of Computing

Rockwell Protocol Interface
     
        (RPI) A cost-cutting feature of some {modem}s allowing data
        {compression} and {error correction} (e.g. {ITU-T} {V.42bis},
        {V.42}) to be provided in software instead of hardware.
     
        Usually an RPI modem comes with RPI-aware software (e.g. the
        low-end RPI models of Supra come with the {COMit} which
        supports RPI, providing {MNP} 2,4,5,7, V.42 and V.42bis).  RPI
        is not supported by many commercial packages nor by current
        releases of popular {shareware} communication programs
        ({Telix} v3.22 and {Telemate} v4.12).  {ProComm Plus} for
        {Windows 2.0} will support RPI.
     
        Currently {Rockwell} produce two classes of RPI chip set.  The
        original is capable of 2400 bit/s data, 9600 bit/s class
        1-only fax.  The newer one is capable of 14400 bit/s data/fax.
        Currently there are no RPI chipset from Rockwell supporting
        speeds higher than 14400 bit/s.
     
        (1994-07-01)