It is a kind of the SIP server.

Well, I think going of the problem of SIP today. This problem has the main proxy of server user agent server and RedirectServer･Register Server, etc. that construct SIP in the problem of the kind of the server that constructs the system of SIP. It is this problem to divide the proxy server from the viewpoint of the state management especially that again in detail. Then, today's problem is [kochira] ↓↓.


- SIP Server

The server that has the function to rewrite the requested address from the client at another address is called a proxy server.

These sentences are wrong.
- Isn't it not neither a proxy server because it rewrites it at another address nor RedirectServer?
- Change the input origin and output destinations of redirect = program to the one different from usually.
- In the meaning of "Substitution proxy =", the request of the client is relaid to the server corresponding to each service as a representation of the client.



It is classified from the viewpoint of the state management of the transaction into two, and the state of the transaction is not managed among these, and the proxy server only of the relay of the message is said by the proxy server StatelessServer.

These sentences are correct.
- The state of StatelessServer = transaction is not managed.
- The state of state full server = transaction is managed.


The server that relays the message to the server that provides service is called RedirectServer according to the request from the client.

These sentences are wrong.
- Isn't it not neither RedirectServer because the message is relaid to the server that provides service nor a proxy server?
- Change the input origin and output destinations of redirect = program to the one different from usually.
- In the meaning of "Substitution proxy =", the request of the client is relaid to the server corresponding to each service as a representation of the client.




How?
Was it familiar for a moment to classify the proxy server into "Stateless" and "Full the state" though the part where proxy was reversely explained redirecting in sentences did not think worry so much to be Well it was to be studied the composition of SIP?
The document of RFC of Stateless and a full state for a moment with solves in CocoState full proxy/ Logical entity that maintains transaction state machine of client and server (Define it with RFC3261) while processing the Stateful Proxy request. Alias transaction state full proxy. Refer to section 16 of RFC3261 for detailed operation of state full proxy. (transaction)State full proxy is different from call state full proxy. StatelessProxy/ Logical entity that doesn't maintain transaction state machine of client and server (Define it with RFC3261) when the Stateless Proxy request is processed. StatelessProxy forwards all received requests to the down stream, and all the received responses are forwarded to the improvement stream. I was going to quote the document of this from "Soft reception desk"'s SIP glossary. Around here desire and today when serving as a reference when there is a term that doesn't understand because the term is explained as http://www.softfront.co.jp/tech/whatsSIP/sip_glossary/sip_glossary.html is very detailed