SIP 202 Accepted vs 403 Forbidden
SIP 202 (Accepted) is a 2xx Success response, while 403 (Forbidden) 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, 403 means that the server understood the request but is refusing to fulfill it. Authorization will not help. The request should not be repeated.
Description
The request has been accepted for processing but the processing has not been completed. Used primarily for REFER requests.
Quand vous le voyez
After sending a REFER request for call transfer. The transfer target acknowledges receipt but hasn't completed the transfer yet.
Comment résoudre
Wait for a NOTIFY to learn the outcome of the referred action. If no NOTIFY arrives, check subscription state and network connectivity.
Description
The server understood the request but is refusing to fulfill it. Authorization will not help. The request should not be repeated.
Quand vous le voyez
When the server policy denies the request regardless of credentials. Common for blocked numbers, restricted routes, or ACL violations.
Comment résoudre
Check server ACLs and routing policies. Verify the caller is permitted to make this type of call. Contact the server administrator if the block is unexpected.
Différences clés
202 is a 2xx Success response, while 403 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 403: The server understood the request but is refusing to fulfill it. Authorization will not help. The request should not be repeated.
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 403 when when the server policy denies the request regardless of credentials. Common for blocked numbers, restricted routes, or ACL violations.
Quand utiliser lequel
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 403 (Forbidden): Check server ACLs and routing policies. Verify the caller is permitted to make this type of call. Contact the server administrator if the block is unexpected.