The main purpose of SI client is sending and receiving SI protocol messages.
At the session initiation stage, these messages may contain public addresses, service data, user group names, a preferred regional SI server name, a name of information resource requested by the user, etc.
The user enters SI addresses to a client application directly using HID-device like keyboard or using controls of an application user interface. Following the Open System Interconnection model (OSI) standard (Fig. 21) all messages generated by a client application at presentation, application and session layers undergo transformation into the format suitable for encapsulation into specific transport, network or lower layer protocols.
Fig. 21. Open System Interconnection model.
Built under the SI conception the user interface of SI client (Fig. 22, Fig. 23) is simple, intuitive and extremely easy to use.
Fig. 22. SI client user interface for user-to-user communication.
Fig. 23. SI client user interface for browsing information resources.
SI client acts as an all-purpose means for accessing base and value-added communication services as well as for browsing information resources and interacting with information systems. Thanks to the features of SI client, its user has the same experience accessing various infocommunication services and information resources either available online or stored locally for offline access regardless of their type and physical location.
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