    DP(IV)                       8/24/73                       DP(IV)

    NAME
         dp - DP-11 201 data-phone interface

    DESCRIPTION
         The  dp0 file is a 201 data-phone interface.  Read and write
         calls to dp0 are limited to a maximum of  512  bytes.   Each
         write call is sent as a single record.  Seven bits from each
         byte are written along with an eighth odd parity  bit.   The
         sync  must be user supplied.  Each read call returns charac-
         ters received from a single record.  Seven bits are returned
         unaltered;  the  eighth  bit  is set if the byte was not re-
         ceived in odd parity.  A 10 second time out is set and a ze-
         ro-byte  record  is  returned if nothing is received in that
         time.

    FILES
         /dev/dp0

    SEE ALSO
         dn(IV), gerts(III)

    BUGS

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