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REFER INVITE / 200 INVITE / 200 INVITE / 200 INVITE, Replaces/ 200 OK/ ACK ACK (CN SDP) ACK (CN SDP) ACK (CN SDP) RTP RTP RTP RTP MDSM MN CN BYE/ 200 OK 1 2 2 2 4 4 4 3 5 5 5 5 6 7 SESSIONS TERMINATED ORIGINAL SESSION ORIGINAL SESSION ORIGINAL SESSION Handoff to a Multi-Device System |