A communication system, medium adapter (10) for use therewith, and methods are provided which permit standard ring network transmission media (15) to support both ring and bus communication topologies and protocols, which may be selectively adapted to differing topologies and protocols without physical...http://www.google.com.au/patents/US4803485?utm_source=gb-gplus-sharePatent US4803485 - Lan communication system and medium adapter for use therewith
