Our case study is based on a Logistic Company where they have implemented wireless LANs (WLANs) to all their Warehouse sites. Wireless mobile devices are able to open a session to their application for managing stock, receiving and shipping. This application was developed and based on an IBM Host environment. This is accessed using an industry standard terminal emulation called TN3270. This is a program designed to emulate an IBM 3270 terminal connected to a host or Physical Unit (PU) via IP link. The Company had decided to implement the Wireless IEEE 802.11b standard because it was the most extensive and cost effective technology in the market place. They decided to work with a specific TN3270 gateway product at every site. This gateway provides TN3270 sessions to the wireless devices. But the main surprise was, we found the wireless implementation at each location was with different vendors, NO specific vendor selected. Every site was connected to the Head or Central Office.
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