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The Callisto application allows mobile business users to make calls with their fixed line telephone number. The internal numbering plan of the company can be used. The application works only with the following products of CTModule AG: Callisto UCM, Callisto Express and Callisto One.
The directory of the Android device can be used for call setup.
The Callisto application is creating a Call History.
The Callisto dialer is no VoIP application. The call setup is done by the default telephony application of Android device.