Vapi is lagging on the call, agent cuts out. Is there something we need to do on our end?

To quickly diagnose Vapi call lag or agent cut-out, start by checking the call logs in your dashboard: 1. Go to Observe > Call Logs in the [Vapi dashboard](https://dashboard.vapi.ai/). 2. Review recent calls for error messages, dropped connections, or long processing times. This will help pinpoint if the issue is with your setup, Vapi, or an external provider. Source: - [Debugging voice agents](https://docs.vapi.ai/debugging)

Hi Melannie Carranza-Iglesias, To address call forwarding issues where calls drop immediately after initiating a transfer, follow these steps: 1. **Verify Forwarding Initiation**:Check if Vapi successfully initiated the forwarding using the API:

python
   from vapi import Vapi
   client = Vapi(token=os.getenv("VAPI_API_KEY"))
   call = client.calls.get("ca123456xxxxx")
   print(f"End reason: {call.ended_reason}")

If the

endedReason

is not

"assistant-forwarded-call"

, review your assistant's configuration. 2. Check Configuration: - Ensure

"phone-call-control"

is not in your

serverMessages

to prevent conflicting call control. - Set

phoneCallProviderBypassEnabled

to

false

for standard Vapi forwarding. 3. **Verify Transfer Compatibility**:Confirm that your transfer scenario is supported. Unsupported scenarios include web calls to phone numbers and PSTN to SIP transfers. 4. **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](https://console.twilio.com/us1/monitor/logs/calls) - For Vonage: [Vonage API Dashboard](https://dashboard.nexmo.com/) - For Telnyx: [Telnyx Mission Control Portal](https://portal.telnyx.com/) 5. **SIP Trunking**:If applicable, use Wireshark to analyze SIP signaling for missing or errored REFER packets. For more detailed troubleshooting steps, please refer to our [debug forwarding drops guide](https://docs.vapi.ai/phone-calling/in-call-control/transfer-calls/debug-forwarding-drops).