A network-based intercom system and method comprises software and the necessary portions of a computer network on which it is implemented. The software includes a dispatcher module to be installed on any of the computers of the network, and an intercom module to be installed on each of the participating...http://www.google.ca/patents/US6937712?utm_source=gb-gplus-sharePatent US6937712 - Network-based intercom system and method for simulating a hardware based dedicated intercom system
