SIP 202 Accepted vs 436 Bad Identity-Info
SIP 202 (Accepted) is a 2xx Success response, while 436 (Bad Identity-Info) is a 4xx Client Failure 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, 436 means that the Identity-Info header contains a URI that the server cannot dereference to obtain the signing certificate.
描述
The request has been accepted for processing but the processing has not been completed. Used primarily for REFER requests.
何时出现
After sending a REFER request for call transfer. The transfer target acknowledges receipt but hasn't completed the transfer yet.
如何修复
Wait for a NOTIFY to learn the outcome of the referred action. If no NOTIFY arrives, check subscription state and network connectivity.
描述
The Identity-Info header contains a URI that the server cannot dereference to obtain the signing certificate.
何时出现
When the Identity-Info URI in the request points to an unreachable or invalid certificate location.
如何修复
Ensure the Identity-Info URI is reachable and points to a valid certificate. Check DNS resolution and TLS configuration.
主要区别
202 is a 2xx Success response, while 436 is a 4xx Client Failure response.
SIP 202: The request has been accepted for processing but the processing has not been completed. Used primarily for REFER requests.
SIP 436: The Identity-Info header contains a URI that the server cannot dereference to obtain the signing certificate.
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 436 when when the Identity-Info URI in the request points to an unreachable or invalid certificate location.
何时使用哪个
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 436 (Bad Identity-Info): Ensure the Identity-Info URI is reachable and points to a valid certificate. Check DNS resolution and TLS configuration.