A communications network provides one or more shared services, such as voice or video, to customers over a respective virtual private network (VPN). At the same time, each customer may have its own private data VPN for handling private company data. The shared service VPN permits users from different...http://www.google.com/patents/US20040223500?utm_source=gb-gplus-sharePatent US20040223500 - Communications network with converged services
