Advanced IP services, including Voice-over-WiFi (VoWiFi), Voice-over-LTE (VoLTE), VoLTE roaming (VoLTE-R) and Rich Communication Services (RCS), are defining the next generation network. Fueled by the marketing campaigns of wireless and mobile broadband operators, iconic device manufacturers, and the actual availability of these services in the marketplace, they are quickly becoming essential services that consumers are demanding.

Interop: Competition to be Enabled by Cloud-Based IP Services
The transition to all IP networks is the largest fundamental shift in the industry since the migration from analog to digital.