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Telephonic Communications > Special Services > Three-way Calling Three-way CallingThree-way Calling patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.11/22/07 - 20070269033 - Three-way call detection using steganography Three-way call detection is an important component of correctional facility telephone equipment because it helps restrict calling access by certain persons to certain restricted telephone numbers. Various three-way call detection methods exist, but all of these implementations suffer from one major limitation—the detection accuracy is not as high as is ... 09/06/07 - 20070206761 - Comparative tone return time three-way call detect The present subject matter is directed to an apparatus and methodology for detecting three-way call attempts during telephone conversations. Per the methodology, apparatus is configured to, in effect, “ping” a called telephone by transmitting an audio frequency range tone over the loop established from the calling telephone to the called ... 08/24/06 - 20060188078 - Call management using call routing engine A telephone call management system first receives a call over a telephone network from a calling device. The calling device is connected to a first called device by a first connection through the telephone network. A first call management message is received at a call routing engine, the first call ... ### FreshPatents.com Support |