A communications adapter is provided for interfacing between a master device and an I/O device (body) having an output and/or an input. In the case of the I/O body having an output, the adapter has a TCP port for coupling to the master device via a transmission path for receiving a request message. The...http://www.google.es/patents/US6233626?utm_source=gb-gplus-sharePatente US6233626 - System for a modular terminal input/output interface for communicating messaging application layer over encoded ethernet to transport layer
System for a modular terminal input/output interface for communicating ...
