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Gartner Glossary
IP Multimedia Subsystem (IMS)
IP Multimedia Subsystem (IMS) is an open architecture standard based on Session Initiation Protocol. It defines how applications and services are delivered to customers, regardless of the access network on which they run. IMS separates session control from the host application for maximum flexibility and standardizes the signaling and control layer, together with network-based and Web-enabled applications and services.
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