Patent ID: 7079647

Claim:
An internet protocol (IP) telephone, comprising: an input connector for receiving from a network a signal containing a digital component and a current component; a separator for separating said current component from said digital component; telephone circuitry for providing audio input and output; a central processing unit (CPU) for controlling operations of said telephone circuitry to cause said telephone circuitry to provide said audio input and output; and a power source circuit for receiving said current component from said separator, said power source circuit comprising: an input current limiting resistor for limiting said current component; a direct-current to direct-current (DC/DC) converter that is connected to said input current limiting resistor; an input capacitor that is charged by said current component; and limit removing means for removing the limitation imposed by said input current limiting resistor when said limit removing means is turned on; wherein said CPU is configured to determine an amount of power being consumed by said CPU; and wherein said CPU is configured to turn said limit removing means on or off based on the determined amount of power being consumed by the CPU.