3xx Redirection Responses Clause Samples

3xx Redirection Responses. Support for 3xx Redirection Responses is optional for all UAs. 3xx Redirection Responses support To, From, Via, Call-ID, CSeq, Content-Length, and Contact headers, but are not limited to these headers. UACs that support 3xx Redirection Responses only interpret the Contact headers in the 3xx Response, which can be used to redirect the call. The 3xx responses in SIP are • 300 Multiple Choices • 301 Move Permanently • 302 Moved Temporarily • 305 Use Proxy • 380 Alternative Service UACs that do not support 3xx Redirection Responses treat a 3xx response as a 4xx Request Failure response. SIP/2.0 300 Multiple Choices Via: SIP/2.0/UDP 172.17.2.29:5060 From: IP30 Phone 1 <SIP:▇▇▇▇▇▇▇▇▇▇@172.17.2.29>;tag=949D.80A7 To: <SIP:▇▇▇▇▇▇▇▇▇▇@172.20.2.31> Call-ID: ▇▇▇▇.▇▇▇▇.A152.3C44.949D.80A7@172.17.2.29 CSeq: 21478 INVITE Content-Length: 0 Contact: SIP:▇▇▇▇▇▇▇▇▇▇@172.80.2.100:5060 SIP/2.0 300 Multiple Choices Via: SIP/2.0/UDP [3ffe:302:feed:beef:208:74ff:fee1:d3ca]:5060 From: IP30 Phone 1 <SIP:▇▇▇▇▇▇▇▇▇▇@[3ffe:302:feed:ffff::d49d:cdce]>;tag=949D.80A7 To: <SIP:▇▇▇▇▇▇▇▇▇▇@[3ffe:302:feed:ffff::d49d:cdce]> Call-ID: ▇▇▇▇.▇▇▇▇.A152.3C44.949D.80A7@[3ffe:302:feed:beef:208:74ff:fee1:d3ca] CSeq: 21478 INVITE Content-Length: 0 Contact: SIP:▇▇▇▇▇▇▇▇▇▇@[3ffe:302:feed:ffff::d49d:cdce]:5060