A Voice over Internet Protocol (VoIP) communications system, a method of managing a communications network in such a system and a program product therefore. The system/network includes an ENERGY STAR (E-star) aware softswitch and E-star compliant communications devices at system endpoints. The E-star aware softswitch allows E-star compliant communications devices to enter and remain in power saving mode. The E-star aware softswitch spools messages and forwards only selected messages (e.g., calls) to the devices in power saving mode. When the E-star compliant communications devices exit power saving mode, the E-star aware softswitch forwards spooled messages.
ENERGY STAR or E-Star is a joint program of the U.S. Environmental Protection Agency (EPA) and the U.S. Department of Energy. The Government introduced ENERGY STAR in 1992 as a voluntary labeling program designed to identify and promote energy-efficient products to reduce greenhouse gas emissions.