Anonymous module is the way to allow access to Livelink by the 'un-subscribed', and is available for Livelink 9x releases.
Once the module is installed, you need to create an "Anonymous" User and Group in order to control access to your Livelink Community model. Quite restricted in most cases, i.e. only 'see/see contents' for truly 'public' information.
There should be a paper expalining Anonymous in detail on the KC.