Patent ID: 8213592
Filing Date: 2012-07-03
Classification: H04M

Abstract:
1. A telephone call management method, comprising: receiving a call over a public switched telephone network from a calling device; establishing a first connection between the calling device and a first called device through the public switched telephone network; determining a second called device should be added to the call; issuing a first call management message from the first called device to a call routing engine, the first call management message to request the call routing engine issue a second call management message to initiate establishment of a second connection to enable a call among the calling device, the first called device, and the second called device; and receiving the second call management message from the call routing engine at the first called device, the second call management message specifying a DTMF sequence for provision by the first called device to the public switched telephone network to cause the public switched telephone network to establish the second connection.