SIP 181 Call Is Being Forwarded vs 202 Accepted
SIP 181 (Call Is Being Forwarded) is a 1xx Provisional response, while 202 (Accepted) is a 2xx Success response. 181 indicates that a proxy server may send this to indicate that the call is being forwarded to a different set of destinations. In contrast, 202 means that the request has been accepted for processing but the processing has not been completed. Used primarily for REFER requests.
الوصف
A proxy server may send this to indicate that the call is being forwarded to a different set of destinations.
متى تراه
When the callee has call forwarding enabled and the request is being redirected to another number or device.
كيفية الإصلاح
No action needed. The call is being redirected. If forwarding is unintended, the callee should update their forwarding settings.
الوصف
The request has been accepted for processing but the processing has not been completed. Used primarily for REFER requests.
متى تراه
After sending a REFER request for call transfer. The transfer target acknowledges receipt but hasn't completed the transfer yet.
كيفية الإصلاح
Wait for a NOTIFY to learn the outcome of the referred action. If no NOTIFY arrives, check subscription state and network connectivity.
الفروق الرئيسية
181 is a 1xx Provisional response, while 202 is a 2xx Success response.
SIP 181: A proxy server may send this to indicate that the call is being forwarded to a different set of destinations.
SIP 202: The request has been accepted for processing but the processing has not been completed. Used primarily for REFER requests.
You encounter 181 when when the callee has call forwarding enabled and the request is being redirected to another number or device.
You encounter 202 when after sending a REFER request for call transfer. The transfer target acknowledges receipt but hasn't completed the transfer yet.
متى تستخدم أيًا منهما
For 181 (Call Is Being Forwarded): No action needed. The call is being redirected. If forwarding is unintended, the callee should update their forwarding settings. 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.