v7 man page for dn

DN(4)							     Kernel Interfaces Manual							     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)

																	     DN(4)