    DN(IV)                       3/20/74                       DN(IV)

    NAME
         dn - DN-11 ACU interface

    DESCRIPTION
         The dn?  files are write-only.  The permissible codes are:

             0-9 dial 0-9
             :   dial *
             ;   dial #
             -   4 second delay for second dial tone
             =   end-of-number

         The  entire  telephone  number must be presented in a single
         write system call.

         It is recommended that an end-of-number code be  given  even
         though not all ACU's actually require it.

    FILES
         /dev/dn0        connected to 801 with dp0
         /dev/dn1        not currently connected
         /dev/dn2        not currently connected

    SEE ALSO
         dp(IV)

    BUGS

                                  - 1 -