A method and apparatus for providing emergency services, e.g., E911 services, for nomadic users by utilizing network announcements to remind customers to update location information used to provide services on packet networks, such as Voice over Internet Protocol (VoIP) and Service over Internet Protocol...http://www.google.de/patents/US8059645?utm_source=gb-gplus-sharePatent US8059645 - Method and apparatus for providing E911 services via network announcements
