The SMS PlugIn is implemented based in layered architecture, allowing to separate business logic from the logic of design. The architecture of the PlugIn is divided into three main layers: Browser that represents the presentation layer, server layer jWebSocket representing the Business and Supplier layer that represents the connection to the mobile network. The SMS PlugIn does not have a data layer and does not require a Database to work. Furthermore, the development can be carried out at various levels and in case there happens a change, only the required level is affected. Figure 1.
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