Patent ID: 7546340

Claim:
A portable server for sending and receiving data to and from a plurality of terminal devices, comprising: a wireless communication unit for sending and receiving the data via wireless communication; a radio field intensity input unit that allows the radio field intensity of the wireless communication unit to be input using an interactive interface, having a plurality of keys, located on the outer surface of the portable server; a memory unit for storing the data; a battery in a housing for supplying power to an internal circuit, the wireless communication unit, and the memory unit; an authentication unit that compares a stored password with a password entered at power-on and allows the data to be sent and received only when the passwords match; and a supply circuit adapted to distribute power to components of the portable server and adapted to draw power from a second power supply when the portable server is connected to a cradle, and to draw power from the battery when the portable server is not connected to the cradle.