SIP 202 Accepted vs 505 Version Not Supported
SIP 202 (Accepted) is a 2xx Success response, while 505 (Version Not Supported) is a 5xx Server 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, 505 means that the server does not support the SIP protocol version that was used in the request. Currently only SIP/2.0 is standardized.
Mô tả
The request has been accepted for processing but the processing has not been completed. Used primarily for REFER requests.
Khi bạn thấy mã này
After sending a REFER request for call transfer. The transfer target acknowledges receipt but hasn't completed the transfer yet.
Cách khắc phục
Wait for a NOTIFY to learn the outcome of the referred action. If no NOTIFY arrives, check subscription state and network connectivity.
Mô tả
The server does not support the SIP protocol version that was used in the request. Currently only SIP/2.0 is standardized.
Khi bạn thấy mã này
Extremely rare. Would occur if a client sends a request with a SIP version other than 2.0.
Cách khắc phục
Ensure your UA uses SIP/2.0 in the request line. This is the only standardized version.
Sự khác biệt chính
202 is a 2xx Success response, while 505 is a 5xx Server Failure response.
SIP 202: The request has been accepted for processing but the processing has not been completed. Used primarily for REFER requests.
SIP 505: The server does not support the SIP protocol version that was used in the request. Currently only SIP/2.0 is standardized.
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 505 when extremely rare. Would occur if a client sends a request with a SIP version other than 2.0.
Khi nào dùng cái nào
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 505 (Version Not Supported): Ensure your UA uses SIP/2.0 in the request line. This is the only standardized version.