VAPI•2mo ago

Call Drops Abruptly very Often

Hello,

My calls have been dropping very often recently and I have been trying to figure out what the cause is. The following are some call IDs you can check:

019a3bc8-c0ce-7bbe-b9ce-e4a266b95791
019a362a-31c1-7ccb-b42f-28938760ac2c
019a3635-31ba-7882-b772-31d54ee7e9cc

Please kindly help figure our what is causing the call failure.

Thanks!

KyleAPP•11/3/25, 8:31 PM

Hi Ibrahim,

To address the issue where calls drop immediately after initiating a transfer, you may want to follow these steps:

**Verify if Vapi initiated the forwarding:**
- Use the API to check if the call
```
endedReason
```
```
endedReason
```
  is
```
assistant-forwarded-call
```
```
assistant-forwarded-call
```
  . If yes, Vapi forwarded the call, and you can proceed to check with your telephony provider. If not, review your assistant's configuration. You can refer to the Debug call forwarding drops guide.
**Check telephony provider logs:**
- Access your telephony provider's dashboard (like Twilio, Vonage, or Telnyx), and search using the phoneCallProviderIdphoneCallProviderId from the Vapi response. Look for errors during the call transfer process. Use links like Twilio Console > Call Logs to find detailed error logs.
**Analyze SIP signaling (if applicable):**
- Download the PCAP file if you're using a SIP-based call and analyze it with Wireshark. Look for the REFERREFER packet to see if Vapi sent the transfer request.
**Review and correct configurations:**
- Ensure the destination number is correctly formatted and reachable. Check your assistant's settings to ensure proper configuration without server message overrides that might prevent Vapi from managing the transfer.

For more detailed steps or alternative solutions, you can refer to the same Debug call forwarding drops guide for guidance.

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Debug call forwarding drops | Vapi

Learn to troubleshoot calls that drop immediately after initiating transfer

Call Drops Abruptly very Often

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