3/15/72                                                   DN (IV)

NAME            dn0 -- dn-11 ACU interface

SYNOPSIS        --

DESCRIPTION     dn0 is a write-only file.  Bytes written on dn0

                must be ASCII digits.  Each digit corresponds to

                a digit of a telephone number to be called.  The

                entire telephone number must be presented in a

                single write system call.  The call must complete

                with the last digit.

FILES           found in /dev

SEE ALSO        dp0(IV), write(II)


BUGS            --

OWNER           ken, dmr