Hi team, I’m experiencing a critical issue with the system. When sending calls to VAPI, they remain silent and do not respond. After several attempts, the issue persists. I’ve checked and noticed that VAPI is returning a 487 Request Terminated response. Could you please look into this urgently? If you need any additional information, I can share it privately with the support team. Thank you in advance for your assistance. Best regards, S.Caballero

Same here, hope support makes its magic soon

Yes, the issue has been resolved, thank you very much.

Hi caballero330, If you're facing an issue with call forwarding where calls drop immediately after initiation, you can follow the detailed guidance [here](https://docs.vapi.ai/phone-calling/transfer-calls/debug-forwarding-drops). Here's a quick summary of the steps to troubleshoot: 1. Verify Forwarding Initiation: - Check if Vapi successfully initiated the forwarding by inspecting the

endedReason

. If it shows

"assistant-forwarded-call"

, proceed with analyzing provider logs. 2. Check Your Assistant's Configuration: - Ensure

"phone-call-control"

is not included in the

serverMessages

if Vapi should handle the call control, and

phoneCallProviderBypassEnabled

is set to

false

. 3. Analyze Provider Logs: - Access your telephony provider's dashboard using the

phoneCallProviderId

to investigate transfer errors. 4. Examine SIP Packets: - If using SIP, download the PCAP file and inspect it with Wireshark, focusing on

REFER

packets to verify if transfer requests were sent and acknowledged. 5. Common Issues: - Ensure the destination number format is correct, includes the country code, is reachable outside Vapi, and does not have call blocking enabled. For specific error codes or detailed steps, refer to the full troubleshooting document.

A

SIP 487

Error isn't really an error. It will occur when a call has been

CANCELED

at the source, namely, the call origin decided to abandon the call. This is a normal status code for un-answered calls.