Vapi is lagging on the call, agent cuts out
Vapi is lagging on the call, agent cuts out. Is there something we need to do on our end?
VTo quickly diagnose Vapi call lag or agent cut-out, start by checking the call logs in your dashboard:
Source:
- Go to Observe > Call Logs in the Vapi dashboard.
- Review recent calls for error messages, dropped connections, or long processing times.
Source:
⤵️ Mention @Vapi Support Bot for follow-ups 🐥
KHi Melannie Carranza-Iglesias,
To address call forwarding issues where calls drop immediately after initiating a transfer, follow these steps:
If the
To address call forwarding issues where calls drop immediately after initiating a transfer, follow these steps:
- Verify Forwarding Initiation:Check if Vapi successfully initiated the forwarding using the API:
If the
endedReason is not "assistant-forwarded-call", review your assistant's configuration.- **Check Configuration:**
- Ensure
"phone-call-control"is not in yourserverMessagesto prevent conflicting call control. - Set
phoneCallProviderBypassEnabledtofalsefor standard Vapi forwarding.
- Ensure
- Verify Transfer Compatibility:Confirm that your transfer scenario is supported. Unsupported scenarios include web calls to phone numbers and PSTN to SIP transfers.
- **Telephony Provider Logs**:If Vapi shows a successful forwarding (`"assistant-forwarded-call"`), check your telephony provider's logs for potential issues:
- For Twilio: Twilio Console > Call Logs
- For Vonage: Vonage API Dashboard
- For Telnyx: Telnyx Mission Control Portal
- **SIP Trunking**:If applicable, use Wireshark to analyze SIP signaling for missing or errored REFER packets.
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