DN(4)                                                       DN(4)

     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(4)