When a TN3270 client (14) uses the Transmission Control Protocol/Internet Protocol ("TCP/IP")to initiate contact with a TN3270 server (18) to obtain access to an applications program running on a host (12) with which the server (18) employs the Systems Network Architecture ("SNA")protocol to communicate,...http://www.google.com.hk/patents/US6122276?utm_source=gb-gplus-share專利 US6122276 - Communications gateway mapping internet address to logical-unit name
