Telefónica demonstrates LTE to 3G call transfer

Telefónica is claiming to be the first network operator to demonstrate the seamless transfer of telephone multivendor calls from an LTE network to a 3G network.

The carrier tested the Single Radio Voice Call Continuity (SRVCC) technology in a lab environment that accurately simulates a real mobile network.

Telefónica said that the technology was a breakthrough because while there had been VoLTE progress in South Korea and the US, today’s LTE networks are unable to handover VoLTE voice calls to 2G or 3G when moving out of LTE coverage.