Patent ID: 7542462
Filing Date: 2009-06-02
Classification: H04L,H04M

Abstract:
1. A method for multicast telephony call signaling comprising: transmitting telephony call setup requests over a packet network from an originating source to a plurality of subscribing endpoints, wherein a multicast address is used for a substantially simultaneous distribution of the requests to the subscribing endpoints of the multicast address; receiving an alert message response from at least one of the plurality of endpoints, wherein the alert message identifies a type of a communication device at each responding endpoint; establishing at least one call connection between the originating source and at least one of the plurality of endpoints from which an alert message has been received; and sending a connect signal, in response to establishing the at least one call connection, to the subscribing endpoints using the multicast address to notify the subscribing endpoints that a communication path will be established over the packet network with the originating source.