In a telephone conferencing system, a digital communication network such as the Internet is used to establish and control the telephone connections between multiple conferees with the telephone network being the means of exchanging verbal information. Each conferee may have a computer connected to the...http://www.google.de/patents/US20040131018?utm_source=gb-gplus-sharePatent US20040131018 - Dial up telephone conferencing system controlled by an online computer network
