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

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

Sip code	Description	Symptoms	Resolution
403 Forbidden	The request was rejected.	The request is rejected, and the call signaling is unresponsive.	Check the following configurations: Configure the IVR basic operations and publish the IVR process. This ensures that calls are routed through the intended Interactive Voice Response (IVR) flow. Verify the skill group settings to ensure that the calling number is correctly mapped to an agent. Ensure the calling number's account has a positive balance.
404 Not Found	Configuration error. The user specified in the Request-URL does not exist on the server.	Call signaling is unresponsive.	Check the following configurations: Verify that the IVR basic operations are configured correctly and that the IVR process is published. This ensures that the calling number is handled by the designed Interactive Voice Response (IVR) flow. Verify the skill group settings to ensure that the calling number is correctly mapped to an agent. If the IVR and skill group are configured correctly but the error persists, contact Alibaba Cloud technical support through DingTalk (ID: cccsupport2). We will coordinate with the Voice Service technical support team to resolve the issue. If all configurations are correct, the called number may not be in service.
408 Request Timeout	The server did not respond within the specified time.	The called party's phone is ringing, but the call is not answered.	Try calling again later.
471 Request Failure	The request failed.	The call attempt fails with no response.	Contact Alibaba Cloud technical support through DingTalk (ID: cccsupport2). Provide the calling number, the called number, and the time of the call. We will coordinate with the Voice Service technical support team to resolve the issue.
472 ILLEGAL_CALLER_NUMBER	Invalid calling number.	The call is restricted. Depending on the carrier, you may hear a voice prompt indicating the restriction.	Contact Alibaba Cloud technical support through DingTalk (ID: cccsupport2). Provide the calling number, the called number, and the time of the call. We will coordinate with the Voice Service technical support team to resolve the issue.
473 CALLED_FREQUENCY_LIMIT	The call frequency limit for the called number was exceeded.	The call is restricted. Depending on the partner, you may hear a voice prompt such as, "Call restricted. Unauthorized use is prohibited."	To prevent harassment and user complaints due to frequent calls, partners impose the following restrictions on a single called number: Call frequency limit: A number can be called a maximum of 3 times per day and 5 times per month. Calling time window: Outbound calls are only allowed from 9:00 AM to 9:00 PM. Note Call restriction policies vary by partner, so the actual limits and time windows may differ. To confirm or adjust the policy, contact your partner.
474 CALLED_BLACKLIST_LIMIT	The outbound call is blocked by a blacklist.	The call is restricted. Depending on the partner, you may hear a voice prompt indicating the restriction.	Contact Alibaba Cloud technical support through DingTalk (ID: cccsupport2). Provide the calling number, the called number, and the time of the call. We will coordinate with the Voice Service technical support team to resolve the issue.
475 CALL_CAPS_LIMIT	The QPS or CAPS limit for the partner's carrier was exceeded.	The call is restricted. Depending on the partner's carrier, you may hear a voice prompt indicating the restriction. This error can occur if the QPS of the partner's carrier exceeds its limit, restricting all numbers associated with that partner.	Contact Alibaba Cloud technical support through DingTalk (ID: cccsupport2). Provide the calling number, the called number, and the time of the call. We will coordinate with the Voice Service technical support team to resolve the issue.
476 ACCOUNT_STOP_LIMIT	Account is suspended due to credit control or an overdue balance.	Symptom 1: The call cannot be placed. Symptom 2: The account associated with the calling number has an overdue balance.	Solution for Symptom 1: Check the bills for the Voice Service in Cloud Contact Center, and add funds to your account. Solution for Symptom 2: Add funds to the account associated with the calling number.
477 CALLER_FREQUENCY_LIMIT	The call frequency limit for the individual calling number was exceeded.	The call is restricted. Depending on the partner, you may hear a voice prompt indicating the restriction. This error indicates that the partner's call frequency limit for an individual number has been exceeded.	Contact Alibaba Cloud technical support through DingTalk (ID: cccsupport2). Provide the calling number, the called number, and the time of the call. We will coordinate with the Voice Service technical support team to resolve the issue.
478 CALLED_PERIOD_LIMIT	The call was made outside the allowed time window, which is typically 9:00 AM to 9:00 PM.	The outbound call fails because the attempt was made outside the partner's allowed calling hours.	Contact Alibaba Cloud technical support through DingTalk (ID: cccsupport2). We will contact the Voice Service technical support team to confirm the allowed calling time window.
480 Temporarily Unavailable	The called party did not answer, rejected the call, is busy, or their phone is switched off.	The call rings for a set duration and then disconnects. Depending on the partner, you may hear a voice prompt that the number is busy or switched off.	Contact Alibaba Cloud technical support through DingTalk (ID: cccsupport2). Provide the calling number, the called number, and the time of the call. We will coordinate with the Voice Service technical support team to resolve the issue.
482 Loop Detected	The server detected a loop in the call routing.	The call is dropped immediately after connecting.	The partner has identified the called number as high-risk and blocked the call request. Contact Alibaba Cloud technical support through DingTalk (ID: cccsupport2). Provide the calling number, the called number, and the time of the call. We will coordinate with the Voice Service technical support team to resolve the issue.
486 Busy Here	The called party is busy on another call.	Depending on the partner, you may hear a voice prompt indicating that the number is busy.	Wait for the other party to finish their call, and then try again.
487 Request Terminated	The called party rejected the call or their phone is switched off.	Depending on the partner, you may hear a voice prompt such as "The number you have dialed is switched off" or "Call restricted. Unauthorized use is prohibited."	If the party's phone is switched off, try calling again later. This prompt usually indicates that the partner enforces a calling window, such as from 9:00 AM to 9:00 PM.
5xx Server Failure	An internal server error occurred on the partner's side.	The call cannot be completed.	Contact Alibaba Cloud technical support through DingTalk (ID: cccsupport2). Provide the calling number, the called number, and the time of the call. We will coordinate with the Voice Service technical support team to resolve the issue.
603 Decline	The number is on the blacklist of the partner's carrier.	The call cannot be completed.	The call was blocked because the called number is on the blacklist of the partner associated with the calling number. Contact Alibaba Cloud technical support through DingTalk (ID: cccsupport2). We will contact the Voice Service technical support team to inquire about removing the number from the blacklist.
606 Not Acceptable	The call connects, but fails during media negotiation because some aspects of the session description are unacceptable.	A call log appears in Cloud Contact Center, but not on the partner's side.	Network issues that cause softphone heartbeat failures or service disconnections can trigger this error. Refresh the page, go online in the workbench, and then try the call again.