Bridging the gap between VoLTE Roaming Models

Most mobile operators around the world are planning to launch voice service over the LTE infrastructure, better known in the industry as VoLTE. Before 2014, standards bodies such as the 3GPP and GSMA, along with most mobile operators, were considering the Local Breakout (LBO) model for VoLTE roaming. In this model, a visited LTE operator provides local breakout of roaming calls, routing them locally or sending them to the home network for routing. This was considered an effective voice roaming model, similar to the roaming model used by 3G networks.

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