The following subsections describe how to install the DUAL Link Interface in FreeBSD 1.1. The sample code and a complete Berkeley Unix implementation is available in machine readable form via anonymous ftp from Internet host minnie.cs.adfa.edu.au (18.104.22.168), file pub/Dual/dual.tar.gz. This is a gzip Unix tar file. It must be ftped in binary mode. Good luck! The URL is ftp://minnie.cs.adfa.edu.au/pub/Dual/dual.tar.gz.