A communications network simultaneously transmits a single message to a number of recipients. This is called a "multicast" transmission. The communications network should have a recipient list database (1302) to receive a list of recipient addresses, a message database (1304) to receive and store the...http://www.google.co.uk/patents/US6085101?utm_source=gb-gplus-sharePatent US6085101 - Communications network having a multicast capability
