Patent ID: 8081747

Claim:
A voice over Internet protocol telephone server comprising: a processor; a computer readable storage medium accessible to the processor; a centralized address book embedded within the computer readable storage medium, wherein the centralized address book comprises a plurality of address books, and wherein each of the plurality of address books is associated with a corresponding voice over Internet protocol telephone, wherein the processor controls communications with the voice over Internet protocol server telephones; and a computer program embedded within the computer readable storage medium, the computer program executable by the processor to: when the centralized address book is configured as a black list, selectively restrict receiving incoming telephone calls and placing outgoing telephone calls based on the centralized address book, and selectively disable alternative methods of establishing a telephone call, when the centralized address book is configured as a white list, selectively enable receiving the incoming telephone calls and placing the outgoing telephone calls based on the centralized address book, enable at least one subordinate voice over Internet protocol telephone to access the centralized address book on a read only basis after the at least one subordinate voice over Internet protocol telephone is moved from a first location to a second location, and enable at least one manager voice over Internet protocol telephone to access the centralized address book on a read-write basis after the at least one manager voice over Internet protocol telephone is moved from the first location to the second location.