What is Circuit Switched FallBack (CSFB) ? Circuit Switched FallBack (CSFB) is a technology used in 4G LTE whereby voice and SMS services are delivered to LTE devices through the use of GSM or another circuit-switched network. Circuit Switched FallBack is needed in some networks because LTE is a packet-based all-IP network that cannot support […]
What is VoLTE? VoLTE stands for voice over LTE and it’s more or less exactly what it says on the tin. It’s voice calls over a 4G LTE network, rather than the 2G or 3G connections which are usually used. We tend to think of 4G as mostly being about downloading, streaming and web browsing, and indeed that’s […]
Explaining Voice over LTE (VoLTE) Voice over LTE, VoLTE technology was devised as a result of operators seeking a standardised system for transferring traffic for voice over LTE. Originally LTE was seen as a completely IP cellular system just for carrying data, and operators would be able to carry voice either by reverting to 2G […]