TIA TIA-873.003-A

All-IP Core Network Multimedia Domain IP Multimedia (IMS) Session Handling: IP Multimedia (IM) Call Model: Stage 2

Telecommunications Industry Association , 06/01/2009

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The present document specifies the IP Multimedia (IM) Call Model for handling of an IP multimedia session origination and termination for an IP Multimedia subscriber. The present document includes interactions between an Application Server and IP multimedia sessions. The IP Multimedia (IM) Subsystem stage 2 is specified [3] and the stage 3 for the IP multimedia call control based on SIP and SDP is specified in [5].