A Call Alerting and Control System is provided in a communication environment to allow an Internet user ("user") approximately real-time monitoring of information about an incoming call from a calling party while maintaining a connection with the Internet. The monitored information can include the calling...http://www.google.de/patents/US6693897?utm_source=gb-gplus-sharePatent US6693897 - Method and system of screening and control of telephone calls while using a packet-switched data network
