Patent ID: 8645507

Claim:
A communications system comprising: a plurality of communications devices being associated with a user; a server having a power management unit; and wherein the power management unit generates a non-preferred device list based on a preferred device list, and wherein incoming calls are routed to at least one preferred communications device of the plurality of communications devices specified in the preferred device list; and wherein the preferred device list identifies at least one of the communications devices on which communications are preferred to be received by the user and the non-preferred device list identifies at least one of the communications devices on which communications are not preferred to be received by the user; wherein the non-preferred device list identifies the plurality of communications devices associated with the user that are not specified in the preferred device list; and wherein the power management unit monitors presence information of the user relating to use of any of the communications devices identified in the preferred device list and any of the communications devices identified in the non-preferred device list and generates an unused device list based on a change in the presence information of the user, the unused device list identifying at least one unused communications device of the plurality of communications devices that are not to be used by the user due to the change in the presence information, the at least one unused communications device comprising at least one communications device of the preferred device list or the non-preferred device list; and wherein the power management unit merges the non-preferred device list and the unused device list to generate a hibernate device list; and wherein the power management unit sends a hibernate command to all communications devices identified in the hibernate device list; and wherein the hibernate command causes the at least one communications devices that receive the hibernate command to enter a low power state.