Voice over LTE (VoLTE) service deployment is ultra-complex. As a result, deployment delays and network failures are commonplace. Single radio voice call continuity (SRVCC) and enhanced SRVCC (eSRVCC) services enable subscribers to enjoy VoLTE services seamlessly across 2G, 3G and LTE access networks, but add further complexity.
An IP Multimedia subsystem (IMS) core network is the backbone responsible for delivering those complex services. So it is imperative to test an IMS network in both live and lab environments to ensure it delivers uncompromising performance.