Common SIP error codes-Voice Bot(Outbound Bot)-阿里云帮助中心

This topic describes common SIP error codes encountered with the intelligent outbound robot and their solutions.

Note

Signaling codes such as 200 and 200-Okay indicate a successful operation or that the call has reached voicemail. They are not error codes.

SIP code	Description	Symptom	Solution
401 Unauthorized	The request requires user authentication.	-	Contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
403 Forbidden	The server received and understood the request but refused to fulfill it. This is typically an issue with the partner's line.	-	Verify that the called number is correct and try again later. If the request is still rejected, contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
404 Not Found	The server received the request, but the callee could not be found in the specified domain.	-	Verify that the called number is correct and try again later. If the request is still rejected, contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
407 Proxy Authentication Required	The client must first authenticate itself with the proxy.	-	Verify that the called number is correct and try again later. If the request is still rejected, contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
408 Request Timeout	The callee's endpoint did not respond before the call timed out.	-	Verify that the called number is correct and try again later. If the request is still rejected, contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
480 Temporarily Unavailable	The callee was contacted but is temporarily unable to take the call. Possible causes include issues with the carrier's line or the callee has enabled anti-harassment call blocking.	-	Contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
484 Address Incomplete	The Request-URI is incomplete.	-	Contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
486 Busy Here	This error can occur if the partner's QPS limit is exceeded or if the callee has enabled anti-harassment call blocking.	-	Contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
487 Request Terminated	The call request was terminated. This can be caused by issues on the carrier's line or the callee has enabled anti-harassment call blocking. Other possible reasons are that the callee has an insufficient account balance, is out of the service area, is busy, or is on another call.	-	Contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
488 Not Acceptable Here	The request cannot be processed at this time. This may be due to a codec negotiation issue.	-	Contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
500 Server Internal Error	The server or voice gateway encountered an error and could not process the request. This may indicate that the partner's line equipment is unavailable.	-	Contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
501 Not Implemented	Possible causes include exceeding the partner's QPS limit or the voice gateway not supporting the required functionality.	-	Contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
502 Bad Gateway	The server or voice gateway received an invalid response from a downstream server.	-	Contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
503 Service Unavailable	The server or voice gateway is unable to process the request due to overload or maintenance.	-	Contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
504 Gateway Timeout	The voice gateway timed out.	-	Contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.
600 Busy Everywhere	The called number is busy.	-	Try calling again later.
603 Decline	The callee has enabled anti-harassment call blocking.	-	Contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`.
606 Not Acceptable	The callee was contacted, but the session could not be established because some parameters in the session description were unacceptable.	-	A network issue may cause softphone heartbeat irregularities and service disconnections. Refresh the page, go online in the workbench, and then try the call again.
CANCEL	This message cancels a request that has not yet received a final response. For example, a caller hangs up while the callee's phone is still ringing (after a `180 Ringing` response is sent).	-	Contact Alibaba Cloud Technical Support on DingTalk at `cccsupport2`. We will coordinate with the partner to resolve the issue.