Hey, I have a problem with both twilio and telnyx. Twilio lagging problem has already it's own ticket. I was planning to switch to telnyx, but reliazed I cant. I have two problems with it. First major is that the voice is LAGGY. Like LAAAGY, like russians in csgo with 5cent microphone. I have no idea what's the cause of it. I didnt change any settings, I tried turning on and off their denoise, that didnt help. For comparison Telnyx vs Twilio: Telnyx: bfc88f72-773f-4292-9fe0-d100d8a787bb Twilio: a121c600-2557-4fc6-bf73-682b0743488b Second smaller problem is that when forwarding the caller id from assistan't phone is shown on the call, not the customers number + telnyx has a very weird sound for forwarding. Can you help me fixing that please? @Shubham Bajaj

Hi Radim! 👋 I understand you're experiencing two issues with Telnyx: voice lagging and incorrect caller ID display during call forwarding. Unfortunately, I don't have access to your Twilio ticket, but I can definitely help with both of your Telnyx issues! ## Voice Lagging Issue There are several potential causes for the voice lagging you're experiencing with Telnyx inbound calls: ### Network-Related Issues - Unstable internet connection or network latency could be causing the lag - High TURN server latency (1200-2000 ms) can contribute to delays in audio transmission - Delayed packets from the provider can cause voice quality problems ### Telnyx Configuration Here are some troubleshooting steps you can try: 1. **Check your network connectivity**: - Ensure your internet connection is stable - Verify network latency from your system to the API endpoints 2. **Review Telnyx configuration**: - Verify inbound authentication setup on Telnyx - Check SIP trunk configuration for any issues - Review the logs for both VAPI and Telnyx for error messages 3. **Test call quality**: - Test the call quality to identify consistent issues with the audio connection - Look into the Reporting section of Telnyx and check PCAP data 4. **Telnyx Denoiser**: - I see you've already tried the denoiser feature, which was a good step ## Caller ID Forwarding Issue Regarding the caller ID showing the assistant's phone number instead of the customer's number: This is a known issue with Telnyx. According to our documentation, when forwarding calls with Telnyx, the assistant's phone number is displayed instead of the customer's number. You can try these solutions: 1. **Set the caller ID during call transfer using the Vapi API**: ``` curl -X POST https://api.vapi.ai/tool \ -H "Authorization: Bearer " \ -H "Content-Type: application/json" \ -d '{ "type": "transferCall", "destinations": [ { "type": "number",

In the telnyx test it completelly stopped my voice after a while, just made is silent.

The audio issue is coming from Telnyx itself. Their system is new, and they have a few such issues which will be fixed over time. I am attaching a screenshot below; it describes the drift detected for this call from Telnyx which results in either user audio being distorted or being lost. https://cdn.discordapp.com/attachments/1355544399680901131/1355854818324775054/Screenshot_2025-03-30_at_4.11.21_PM.png?ex=67ea71b3&is=67e92033&hm=da9121d11b487d399cb828dae8c3c09adc09ae52ef6e725aeb4e602f39ba6a34&

Audio seems normal right now. I guess they fixed it. Thank you. For forwarding, I think that vapi made everything well. I just need to setup to show the actual called number, not the assistant number when calling somebody. I tried to forward a call with telnyx, but it doesn't work. Probably an issue on their end... You can check this CallId, but it seems all good to me. db1c811c-4f7b-47f9-b83c-a12186e45d96 Their debugging tool said: Q.850 cause code: 127 Already messaged them, will wait for their response

please let me know if you require any further help from our side.

Probably not right now, thank you. In case of anything that I can't solve, I will let you know. Thanks Shubham

Marking this ticket as Solved ✅