Voice Call CSFB/ VoLTE

Circuit switched fallback (CSFB):

CSFB is the mechanism to move a subscriber from LTE to a legacy technology to obtain circuit switched voice service. This function is only available if LTE coverage is overlapped by GSM, UMTS, or CDMA.


Voice over LTE (VoLTE):

VoLTE is an essential service for mobile operators as it provides voice support in LTE networks.

Subscribers expect the same quality of service they know from circuit switched voice services.


E2ECE App measures the availability of VoLTE/CSFB services using a real Smartphone with Automated Periodic Testing of Voice Call Service.