Patent ID: 8284763
Filing Date: 2012-10-09
Classification: H04L,H04M,H04Q

Abstract:
1. A method for routing a call in a system comprising a first voice over Internet protocol (VoIP) gateway connected to a first exchange comprising a first foreign exchange office (FXO), the first VoIP gateway comprising a first foreign exchange station (FXS), and a second VoIP gateway connected to a second exchange comprising a FXO and a FXS, the second VoIP gateway comprising a second FXO and a second FXS, the method comprising: transmitting, by the second exchange, a call to the second VoIP gateway through the FXO of the second exchange in response to the call being set up; transmitting, by the second VoIP gateway, the call to the first VoIP gateway in response to receiving the call; and transmitting, by the first VoIP gateway, the call to the first FXO of the first exchange in response to receiving the call, wherein the first exchange comprises no foreign exchange station.