SIP 301 Moved Permanently vs 501 Not Implemented
SIP 301 (Moved Permanently) is a 3xx Redirection response, while 501 (Not Implemented) is a 5xx Server Failure response. 301 indicates that the user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header. In contrast, 501 means that the server does not support the functionality required to fulfill the request. The method is recognized but not implemented.
설명
The user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header.
이 코드를 보게 되는 경우
When a user has permanently changed their SIP address. All future calls should be directed to the new URI.
해결 방법
Update your address book or routing tables to use the new Contact URI provided in the response.
설명
The server does not support the functionality required to fulfill the request. The method is recognized but not implemented.
이 코드를 보게 되는 경우
When the SIP method is valid but the server has not implemented it (e.g., INFO, UPDATE, PRACK on a basic server).
해결 방법
Use a different method that the server supports. Check the Allow header in responses to see supported methods.
주요 차이점
301 is a 3xx Redirection response, while 501 is a 5xx Server Failure response.
SIP 301: The user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header.
SIP 501: The server does not support the functionality required to fulfill the request. The method is recognized but not implemented.
You encounter 301 when when a user has permanently changed their SIP address. All future calls should be directed to the new URI.
You encounter 501 when when the SIP method is valid but the server has not implemented it (e.g., INFO, UPDATE, PRACK on a basic server).
언제 어떤 것을 사용할지
For 301 (Moved Permanently): Update your address book or routing tables to use the new Contact URI provided in the response. For 501 (Not Implemented): Use a different method that the server supports. Check the Allow header in responses to see supported methods.