| IP Multimedia Subsystem Defined by 3GPP and 3GPP2 standards and organizations based on IETF Internet protocols, IMS is a unified IP-based architecture that supports a wide range of services enabled by the flexibility of Session Initiation Protocol (SIP). The IMS architecture can support multiple application servers providing traditional telephony services and non-telephony services such as instant messaging, push-to-talk, video streaming, multimedia messaging, etc. |
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