A technique for establishing and maintaining full duplex communication between two stations connected to a token ring network, without physically reconfiguring the station connections or otherwise disturbing the network. In an auto-configuration full duplex mode of operation, each station ascertains...http://www.google.de/patents/US5155726?utm_source=gb-gplus-sharePatent US5155726 - Station-to-station full duplex communication in a token ring local area network
