Network resource conservation system

摘要: A communications network resource conservation system is provided for that conserves bandwidth and improves voice quality. The method apparatus permit users of H.323 terminal devices to talk each other directly over the Internet thereby eliminating need use resources a telephone switch Public Switched Telephone Network (PSTN). Communication between established via packet network. In one embodiment, path without routing through PSTN as typical call yet get supplementary services from switch. will be set up normal call, but, Intraswitched calling party called their another invention provides way revert an automatically when needed invoke supplemental features telephony service.