VoLTE – Voice over LTE
Based on GSMA IR.92, VoLTE allows subscribers on LTE access to conduct voice calls, without the requirement to fall back to 2G or 3G. Call control is based on an IMS, which will include a TAS for supplementary services. In addition, an SCC-AS will typically be deployed in order to support SR-VCC. During a VoLTE call, subscribers will have a Dedicated EPS bearer in place which provides a guaranteed level of QoS.
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