SIP 202 Accepted vs 301 Moved Permanently
SIP 202 (Accepted) is a 2xx Success response, while 301 (Moved Permanently) is a 3xx Redirection response. 202 indicates that the request has been accepted for processing but the processing has not been completed. Used primarily for REFER requests. In contrast, 301 means 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.
설명
The request has been accepted for processing but the processing has not been completed. Used primarily for REFER requests.
이 코드를 보게 되는 경우
After sending a REFER request for call transfer. The transfer target acknowledges receipt but hasn't completed the transfer yet.
해결 방법
Wait for a NOTIFY to learn the outcome of the referred action. If no NOTIFY arrives, check subscription state and network connectivity.
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.
주요 차이점
202 is a 2xx Success response, while 301 is a 3xx Redirection response.
SIP 202: The request has been accepted for processing but the processing has not been completed. Used primarily for REFER requests.
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.
You encounter 202 when after sending a REFER request for call transfer. The transfer target acknowledges receipt but hasn't completed the transfer yet.
You encounter 301 when when a user has permanently changed their SIP address. All future calls should be directed to the new URI.
언제 어떤 것을 사용할지
For 202 (Accepted): Wait for a NOTIFY to learn the outcome of the referred action. If no NOTIFY arrives, check subscription state and network connectivity. For 301 (Moved Permanently): Update your address book or routing tables to use the new Contact URI provided in the response.