2.0 183 Session Progress Via: SIP/2.0/UDP pcscf.homenet.com;branch=z9hG4bK42234 Via: SIP/2.0/UDP scscf.homenet.com:branch=z9hG4bk34fd2 Via: SIP/2.0/UDP pcscf.visitednet.com;branch=z9hG4bK7866 Via: SIP/2.0/UDP [::0000:1111:2222:33331:2343;comp=sigcomp ;branch=z9hG4bKmp17a43 Record-Route: <sip:pscsf.homenet.com;lr>, <scscf.homenet.com;lr>, :sip:pcscf.visitednet.com;lr> To: tel:+1-314-555-1234>;tag=g41334 From: <sip:mobile1@homenet.com>;tag=34199357834 P-Access-Network-Info: Privacy: none Call-ID: 7o5452gfvtyrfghdgrtt6900gh CSeq: 15 INVITE Contact: <sip:[::0000:aaaa:bbbb:cccc]:8767;comp=sigcomp> Require: 100rel Allow: INVITE, ACK, CANCEL, BYE, PRACK, MESSSAGE, REFER, UPDATE RSeq: 98205 Content-Type: application/sdp Content-Length: 159 O=- 28908445761 28908445761 IN IP6 [::0000:aaaa:bbbb:cccc] t=0 0 C=IN IP6 [::0000:aaaa:bbbb:cccc] m=audio 5434 RTP/AVP 9796 Call Flow Examples b=AS:25.4 a=curr:qos local none a=curr:qos remote none a=des:qos mandatory local sendrecv a=des:gos none remote sendrecv a=rtpmap: 97 AMR a=fmtp:9 mode-set=0,2,5,7 ;maxframes=2 a=rtpmap:96 telephone-event SIP/2.0 183 Session Progress Via: SIP/2.0/UDP scscf.homenet.com:branch=z9hG4bk34fd2 Via: SIP/2.0/UDP pcscf.visitednet.com;branch=z9hG4bK7866 Via: SIP/2.0/UDP [::0000:1111:2222:33331:2343;comp=sigcomp branch=z9hG4bKmp17a43 Record-Route: k<sip:pscsf.homenet.com;lr> <scscf.homenet.com;lr> sip:pcscf.visitednet.com;lr> To: <tel:+1-314-555-1234>;tag=g41334 From: <sip:mobile1@homenet.com>;tag=34199357834 P-Access-Network-Info: 3GPP-UTRAN-TDD; utran-cell-id-3gpp=9459495 Privacy: none P-Charging-Vector P-Asserted-Identity: "Bob" <sip:mobile2@homenet.com> Call-ID: 7o5452gfvtyrfghdgrtt6900gh CSeq: 15 INVITE Contact: <sip:[::0000:aaaa:bbbb:cccc]:8767;comp=sigcomp> Require: 100rel Allow: INVITE, ACK, CANCEL, BYE, PRACK, MESSSAGE, REFER, UPDATE RSeq: 98205 Content-Type: application/sdp Content-Length: 159 O=- 28908445761 28908445761 IN IP6 [::0000:aaaa:bbbb:cccc] t=0 0 C=IN IP6 [::0000:aaaa:bbbb:cccc] m=audio 5434 RTP/AVP 97 96 b=AS:25.4 a=curr:qos local non