Patent ID: 9198103
Filing Date: 2015-11-24
Classification: H04L,H04W

Abstract:
1. A method of switching an Instant Messaging (IM)-based first voice call to a second voice call comprising the steps of: receiving in a service gateway an incoming voice call destined for a telephone number, creating a first call record associated with the service gateway identifying the incoming voice call, establishing over an IM voice network an IM-based first voice call with an IM phone agent, including in the first call record first information about the IM-based first voice call, connecting the incoming voice call to the IM-based first voice call, sending at least a portion of the first call record to a switchover agent, creating a second call record associated with the telephone number including the at least a portion of the first call record and second information about the IM-based first voice call, establishing a second voice call and including information about the second voice call in the first call record, associating the second voice call with the IM-based first voice call, sending a signal to a phone agent indicating that the second voice call is for switch over purpose, and establishing the second voice call with the service gateway.