Call handling on dual-mode wireless handsets

摘要

Embodiments of the invention provide novel solutions, including systems, methods and/or software, for handling calls in a dual-mode VoIP/cellular environment. Merely by way of example, some systems can be configured to determine whether to use a VoIP system or a cellular system to handle a particular call, and/or to transition a call from one network to the other network. Other systems can be configured to substitute a public number (which might be, for example, a VoIP number) for a private number (which might be, for example, a cellular number) when routing a call originating from a dual-mode phone on a cellular network. Further systems can be configured to allow a VoIP system to serve as an anchor for calls originated and/or delivered on a cellular system, for instance to facilitate a transition between cellular and VoIP service during a call.

主权项

1. A telecommunication system for handling a call, the system comprising:
a cellular system comprising a mobile switching center (“MSC”) configured to provide cellular service to the dual-mode phone that operates in a cellular mode and in a voice over Internet Protocol (“VoIP”) mode; and a VoIP system in communication with the MSC, the VoIP system comprising a VoIP switch and configured to serve as an interface between the MSC and a public switched telephone network (“PSTN”), such that when a call is received on a public VoIP telephone number for the dual mode phone, the VoIP system is configured to:
route the call around the MSC and through the VoIP switch to the dual-mode phone when the dual-mode phone is registered with the VoIP system; androute the call through the MSC to a cellular telephone number associated with the dual-mode phone in the cellular system only if the dual-mode phone has unintentionally lost contact with the VoIP system and is thus not registered with the VoIP system, wherein the dual-mode phone, upon obtaining Internet Protocol (“IP”) access, automatically registers with the VoIP system.