The quality of service existing in a data packet network during the course of communication of a voice call through a data network, such as the Internet, is monitored. A minimum acceptable level of service may be predefined with a threshold quality level stored in the user's Call Processing Record (CPR)...http://www.google.com/patents/US20030198218?utm_source=gb-gplus-sharePatent US20030198218 - Packet data network voice call quality monitoring
