	US 7,583,956 B2
	System and method of conferencing endpoints
Anthony J. Sammarco, Garner, N.C. (US)
Assigned to Sony Ericsson Mobile Communications AB, Lund (Sweden)
Filed on Apr. 27, 2006, as Appl. No. 11/412,445.
Prior Publication US 2007/0253348 A1, Nov. 01, 2007
Int. Cl. H04M 11/10 (2006.01); H04Q 11/00 (2006.01)

U.S. Cl. 455—414.1 [370/261]

11 Claims

1. A method of establishing a conference call at a wireless communications device, the method comprising:

establishing a conference call at a wireless communications device operating in a dual transfer mode between the wireless communications device and first and second remote parties, the wireless communications device communicating with the first remote party over a circuit-switched connection and with the second remote party over packet-switched connection; and

receiving, at the wireless communications device, inbound voice data from the first remote party over the circuit-switched connection, and inbound packetized voice data from the second remote party over the packet-switched connection;

transcoding, at the wireless communications device, the inbound voice data into outbound packetized voice data by:

mixing the inbound voice data with voice data generated at a microphone of the wireless communications device to generate composite packetized voice data; and

encoding the composite packetized voice data to be transmitted over the packet-switched connection,

transcoding, at the wireless communications device, the inbound packetized voice data into an outbound voice data by:

mixing the inbound packetized voice data with voice data generated at the microphone of the wireless communications device to generate composite voice data;

encoding the composite voice data to be transmitted over the circuit-switched connection; and

transmitting the composite packetized voice data to the second remote party over the packet-switched connection, and transmitting the composite voice data to the first remote party ever the circuit-switched connection.