RFC 3603 SIP Proxy-to-Proxy Extensions October 2003 5. P-DCS-TRACE-PARTY-ID. . . . . . . . . . . . . . . . . . . . . 6 5.1. Syntax. . . . . . . . . . . . . . . . . . . . . . . . . 7 5.2. Procedures at an Untrusted User Agent Client (UAC). . . 7 5.3. Procedures at a Trusted User Agent Client (UAC) . . . . 7 5.4. Procedures at an Untrusted User Agent Server (UAS). . . 7 5.5. Procedures at a Trusted User Agent Server (UAS) . . . . 7 5.6. Procedures at Proxy . . . . . . . . . . . . . . . . . . 8 5.6.1. Procedures at Originating Proxy . . . . . . . . 8 5.6.2. Procedures at Terminating Proxy . . . . . . . . 8 6. P-DCS-OSPS. . . . . . . . . . . . . . . . . . . . . . . . . . 8 6.1. Syntax. . . . . . . . . . . . . . . . . . . . . . . . . 9 6.2. Procedures at an Untrusted User Agent Client (UAC). . . 9 6.3. Procedures at a Trusted User Agent Client (UAC) . . . . 10 6.4. Procedures at an Untrusted User Agent Server (UAS). . . 10 6.5. Procedures at a Trusted User Agent Server (UAS) . . . . 11 6.6. Procedures at Proxy . . . . . . . . . . . . . . . . . . 11 7. P-DCS-BILLING-INFO. . . . . . . . . . . . . . . . . . . . . . 11 7.1. Syntax. . . . . . . . . . . . . . . . . . . . . . . . . 13 7.2. Procedures at an Untrusted User Agent Client (UAC). . . 14 7.3. Procedures at a Trusted User Agent Client (UAC) . . . . 14 7.4. Procedures at an Untrusted User Agent Server (UAS). . . 15 7.5. Procedures at a Trusted User Agent Server (UAS) . . . . 15 7.6. Procedures at Proxy . . . . . . . . . . . . . . . . . . 16 7.6.1. Procedures at Originating Proxy . . . . . . . . 16 7.6.2. Procedures at Terminating Proxy . . . . . . . . 17 7.6.3. Procedures at Tandem Proxy. . . . . . . . . . . 18 8. P-DCS-LAES and P-DCS-REDIRECT . . . . . . . . . . . . . . . . 18 8.1. Syntax. . . . . . . . . . . . . . . . . . . . . . . . . 19 8.2. Procedures at an Untrusted User Agent Client (UAC). . . 20 8.3. Procedures at a Trusted User Agent Client (UAC) . . . . 20 8.4. Procedures at an Untrusted User Agent Server (UAS). . . 21 8.5. Procedures at a Trusted User Agent Server (UAS) . . . . 21 8.6. Procedures at Proxy . . . . . . . . . . . . . . . . . . 21 8.6.1. Procedures at Originating Proxy . . . . . . . . 22 8.6.2. Procedures at Terminating Proxy . . . . . . . . 23 9. Security Considerations . . . . . . . . . . . . . . . . . . . 24 10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 25 11. Intellectual Property Rights Notice . . . . . . . . . . . . . 25 12. References . . . . . . . . . . . . . . . . . . . . . . . . . 25 12.1. Normative References. . . . . . . . . . . . . . . . . . 25 12.2. Informative References. . . . . . . . . . . . . . . . . 26 13. Acknowledgements. . . . . . . . . . . . . . . . . . . . . . . 26 14. Editors' Addresses. . . . . . . . . . . . . . . . . . . . . . 27 15. Full Copyright Statement. . . . . . . . . . . . . . . . . . . 28 Marshall & Andreasen Informational