Importance

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Abstract

An apparatus, such as a removable computer device (e.g., a USB device), includes application software stored on a computer-readable medium which may be loaded to computer coupled to the device. An interface on the device is used to couple the apparatus to a computer and to pass the application software to the computer. The application software can include a 'soft phone' application. An authentication module on the device provides authentication information, for example from a Subscriber Identification Module (SIM) through the interface, and the application software includes instructions for using the authentication information in a communication exchange over a data network using a cellular telephone protocol with a network element coupled to a cellular telephone network. In some examples, the protocol is a GSM protocol and the network element is Unlicensed Mobile Access (UMA) Network Controller (NC).

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First Claim