VoLTE – Voice over LTE
Voice over Long-Term Evolution (VoLTE) is a new way for transporting voice calls starting with 4G-LTE based mobile (cellular) networks. This approach for the support of voice calls results in the voice service being delivered as pure IP data flows within the LTE all IP data service. In short, unlike earlier generations of mobile networks, there is no more dependency on the legacy circuit-switched voice network to be maintained. VoLTE also offers up support for higher-quality voice codecs and has up to three times more voice and data capacity than 3G UMTS and up to six times more than 2G GSM based transport.