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Description / Abstract:
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].