ch call. [(3) ]() Next step: Check the detailed logs in your call history for the specific

disconnection_reason

and any SIP error codes. This will help pinpoint the root cause. [(1) ]() [(2) ]()

### Answer --- This issue—call connects but no audio in either direction and nothing recorded—typically points to one of these causes: 1. Check the disconnection reason and detailed logs Go to your call history in the Retell Dashboard and check the

disconnection_reason

field and detailed logs for the call. [(1) ]() [(2) ]() Common error codes that may appear include: - `error_no_audio_received`: Retell has not received audio from the telephony side after connection. [(2) ]() -

error_llm_websocket_open

or `error_llm_websocket_lost_connection`: Issues with the LLM websocket connection. *2. If using custom telephony (SIP trunking) * - Double-check your SIP configuration and ensure the correct information was imported. [(1) ]() - Verify that audio is being routed correctly through your telephony provider. A similar issue was reported where calls connected but had no transcription, recording, or analysis—this was linked to SIP connection setup. [(3) ]() - If configuration is incorrect, delete the imported number and re-import. [(1) ]() - Check with your telephony provider to see if there's an error on their side. 3. If using a Retell-purchased number - Ensure the destination number can accept the call (currently, Retell-purchased numbers can only make calls to US numbers) . 4. Data storage settings - If you have "Basic Attributes only" selected in security & fallback settings, recordings and transcripts may not appear in the dashboard—they would only be available via the webhook after ea

​ To learn more, see the sources I considered: [[1] Debug outbound connection issues](https://docs.retellai.com/reliability/debug-outbound-call) [[2] Debug call disconnection](https://docs.retellai.com/reliability/debug-call-disconnect) [[3] The outbound call is made but no call analysis, no transcript and no record exists](https://discord.com/channels/1186424376300679209/1436335899536261180) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

​ To learn more, see the sources I considered: [[1] SIP call using call_id reaches LiveKit but no audio / agent not triggered](https://discord.com/channels/1186424376300679209/1389990836992872471) ​

### Answer I don't have information in the available sources about Retell providing .pcap (packet capture) files for specific call IDs. The sources discuss debugging SIP/audio issues but don't mention a feature or API endpoint to retrieve pcap captures from Retell's side. For your no-audio outbound call issue, I'd suggest: 1. Contact Retell support directly to request any available network-level diagnostics for your call ID 2. Capture on your end — if you're using custom telephony/SIP, you can capture pcap files from your own infrastructure to analyze the RTP streams [(1) ]() Check out these potentially useful sources: - [Debug outbound connection issues]() - [Debug call disconnection]() - [Contact Sales]() Would you like a general answer about how to capture and analyze SIP/RTP traffic on your side instead?

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.