SIP Method : OPTION

< Example 1 >

[Line 1  ] OPTIONS sip:+330123456789@test.3gpp.com;user=phone SIP/2.0

[Line 2  ] Call-ID: PQNwyaUJAA@192.168.1.1

[Line 3  ] CSeq: 1 OPTIONS

[Line 4  ] From: <sip:+339012341234@test.3gpp.com>;tag=PQNwyaUKAA

[Line 5  ] To: <sip:+330123456789@test.3gpp.com;user=phone>

[Line 6  ] Via: SIP/2.0/UDP 192.168.1.1:5060;branch=z9hG4bKf48a17dc1d4ea572d5a31568e8412aa4383432;rport

[Line 7  ] Max-Forwards: 70

[Line 8  ] Contact: <sip:192.168.1.1:5060;transport=UDP>;

            +sip.instance="<urn:gsma:imei:356432059050620>";

            +g.gsma.rcs.ipcall;

            +g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel";video;automata;

            +g.3gpp.iari-ref="urn%3Aurn-7%3A3gpp-application.ims.iari.rcse.im,

                                   urn%3Aurn-7%3A3gpp-application.ims.iari.rcse.ft,

                                   urn%3Aurn-7%3A3gpp-application.ims.iari.rcs.fthttp,

                                   urn%3Aurn-7%3A3gpp-application.ims.iari.rcse.dp,

                                   urn%3Aurn-7%3A3gpp-application.ims.iari.rcse.sp"

[Line 9  ] Accept: application/sdp

[Line 10] Accept-Contact: *;

                           +g.gsma.rcs.ipcall;

                           +g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel";video;automata;

                           +g.3gpp.iari-ref="urn%3Aurn-7%3A3gpp-application.ims.iari.rcse.im,

                                                  urn%3Aurn-7%3A3gpp-application.ims.iari.rcse.ft,

                                                  urn%3Aurn-7%3A3gpp-application.ims.iari.rcs.fthttp,

                                                  urn%3Aurn-7%3A3gpp-application.ims.iari.rcse.dp,

                                                  urn%3Aurn-7%3A3gpp-application.ims.iari.rcse.sp"

[Line 11] Allow: INVITE,UPDATE,ACK,CANCEL,BYE,NOTIFY,OPTIONS,MESSAGE,REFER

[Line 12] Route: <sip:192.168.1.2:5060;transport=udp;lr>

[Line 13] P-Preferred-Identity: <sip:+339012341234@test.3gpp.com>

[Line 14] User-Agent: IM-client/OMA1.0 OrangeLabs-RCS-client/2.5.13

[Line 15] Content-Length: 0