Patent ID: 8897265
Filing Date: 2014-11-25
Classification: H04W

Abstract:
1. A method comprising: hosting a communication session in a call server between a first communication device and a second communication device, the call server operable in an Internet Protocol (IP) based packet data network in which: receiving an out of band signal from the first communication device, the out of band signal separate from the communication session and sent over an open data channel between the first communication device and the call server, the out of band signal comprising an instruction to handoff the original communication link to an alternate communication link between the first communication device and the call server; establishing the alternate communication link between the first communication device and the call server on an alternate network and the IP based packet data network using a second telephone number associated with the first communication device; and joining the alternate communication link between the first communication device and the call server on the alternate network with the second communication link between the second communication device and the call server to maintain the communication session between the first and second communication devices.