ontact: <sip:(::0000:1111:2222:33331:2343;comp=sigcomp> Supported: 100rel Require: precondition Allow: INVITE, ACK, CANCEL, BYE, PRACK, MESSSAGE, REFER, UPDATE RACK: 98205 15 INVITE <Route: <sip:pscsf.homenet.com;lr> Content-Length: 0 PRACK sip:[::0000:aaaa:bbbb:cccc]:8767;comp=sigcomp SIP/2.0 Via: SIP/2.0/UDP pcscf.homenet.com;branch=z9hG4bK4524 Via: SIP/2.0/UDP 3cscf.homenet.com;branch=z9hG4bkhj5fy Via: SIP/2.0/UDP pcscf.visitednet.com;branch=z9hG4bK7866 Via: SIP/2.0/UDP [::0000:1111:2222:33331:2343;comp=sigcomp bbranch=z9hG4bK454245 Max-Forwards: 67 To: ktel:+1-314-555-1234>;tag=g41334 From: ksip:mobile1@homenet.com>;tag=34199357834 P-Access-Network-Info: 3GPP-UTRAN-TDD; utran-cell-id- 3gpp=544542332 Call-ID: 7o5452gfvtyrfghdgrtt6900gh CSeq: 16 PRACK Contact: <sip:[::0000:1111:2222:33331:2343;comp=sigcomp> Supported: 100rel Require: precondition Allow: INVITE, ACK, CANCEL, BYE, PRACK, MESSSAGE, REFER, UPDATE RACK: 98205 15 INVITE Content-Length: 0 SIP/2.0 200 OK Via: SIP/2.0/UDP pcscf.homenet.com;branch=z9hG4bK4524 Via: SIP/2.0/UDP scscf.homenet.com;branch=z9hG4bkhj5fy Via: SIP/2.0/UDP pcscf.visitednet.com;branch=z9hG4bK7866 Via: SIP/2.0/UDP :0000:1111:2222:33331:2343;comp=sigcomp branch=z9hG4bK454245 To: <tel:+1-314-555-1234>;tag=g41334 From: k<sip:mobile1@homenet.com>;tag=34199357834 P-Access-Network-Info: 3GPP-UTRAN-TDD; utran-cell-id- 3gpp=544542332 Call-ID: 7o5452gfvtyrfghdgrtt6900gh CSeq: 16 PRACK Content-Length: 0 SIP/2.0 200 OK Via: SIP/2.0/UDP cscf.homenet.com;branch=z9hG4bkhj5fy Call Flow Examples Via: SIP/2.0/UDP pcscf.visitednet.com;branch=z9hG4bK7866 Via: SIP/2.0/UDP [::0000:1111:2222:3333]:2343;comp=sigcomp branch=z9hG4bK454245 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=544542332 Call-ID: 7o5452gfvtyrfghdgrtt6900gh CSeq: 16 PRACK Content-Length: 0 SIP/2.0 200 OK Via: SIP/2.0/UDP pcscf.visitednet.com;branch=z9hG4bK7866 Via: SIP/2.0/UDP [::0000:1111:2222:33331:2343;comp=sigcomp branch=z9hG4bK454245 To: