G Mayer, H Stahl - US Patent 7,317,695, 2008 - freepatentsonline.com
An apparatus and method initiates a conference call in a telecommunication system. A call set up message is sent by a user's equipment, a message header indicating the equipment's …
G Mayer, H Stahl - US Patent App. 10/445,305, 2004 - Google Patents
An apparatus and method initiates a conference call in a telecommunication System. A call set up message is Sent by a user's equipment, a message header indicating the equip …
G Mayer, H Stahl - US Patent App. 10/445,305, 2004 - freepatentsonline.com
An apparatus and method initiates a conference call in a telecommunication system. A call set up message is sent by a user's equipment, a message header indicating the equipment's …