Abstract: The present disclosure describes one embodiment of an operating center server for managing contact information and user identifiers of users who communicate with others using a plurality of different communication platforms that operate on disparate networks (e.g., a cellular network or a wireless local area network). The operating center server converges cellular connectivity services (e.g., cellular calls or SMS messages) with internet protocol (IP) services (e.g., email or VOIP calls) and provides these services to terminal devices regardless of the specific network connectivity available to the devices.

Abstract: The present disclosure describes one embodiment of an operating center server for managing communication sessions between terminal devices such as mobile phones, VOIP phones, and computers for example. The OC server creates and maintains sessions for one or more terminal devices that allow communication between these disparate devices on disparate communication networks through the OC server.