SIP 202 Accepted vs 600 Busy Everywhere
SIP 202 (Accepted) is a 2xx Success response, while 600 (Busy Everywhere) is a 6xx Global 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, 600 means that the callee's end system was contacted successfully but the callee is busy and does not wish to take the call at this time. Unlike 486 (Busy Here), this is a definitive response.
Описание
The request has been accepted for processing but the processing has not been completed. Used primarily for REFER requests.
Когда вы это видите
After sending a REFER request for call transfer. The transfer target acknowledges receipt but hasn't completed the transfer yet.
Как исправить
Wait for a NOTIFY to learn the outcome of the referred action. If no NOTIFY arrives, check subscription state and network connectivity.
Описание
The callee's end system was contacted successfully but the callee is busy and does not wish to take the call at this time. Unlike 486 (Busy Here), this is a definitive response.
Когда вы это видите
When the callee has rejected the call on all devices. No other endpoints should be tried. The user is universally busy.
Как исправить
Wait and try again later. No alternative contact points exist. The callee must become available on their own.
Ключевые различия
202 is a 2xx Success response, while 600 is a 6xx Global Failure response.
SIP 202: The request has been accepted for processing but the processing has not been completed. Used primarily for REFER requests.
SIP 600: The callee's end system was contacted successfully but the callee is busy and does not wish to take the call at this time. Unlike 486 (Busy Here), this is a definitive response.
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 600 when when the callee has rejected the call on all devices. No other endpoints should be tried. The user is universally busy.
Когда что использовать
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 600 (Busy Everywhere): Wait and try again later. No alternative contact points exist. The callee must become available on their own.