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This database provides a forecast for IP Multimedia Subsystems (IMS) for 2014 to 2020. Data are regional segmentation of annual revenues, cumulative subscribers, and deployments. Insight into the relative mix of mobile, fixed, and converged systems is also forecast. The database also provides a forecast on regional VoLTE subscriptions as well as a section on regional IMS / VOLTE / VOIP / WEBRTC / RCS contract announcements. Companies that will find value here include telecom operators, IMS vendors, and developers of IMS Add-Ons.