Severe audio quality issues on Telnyx ↔ VAPI calls (unintelligible audio)
Hi VAPI team,
I’ve connected Telnyx with VAPI and I’m seeing consistently very poor audio quality on live calls—so bad that the speech is unintelligible.
Carrier: Telnyx (private German phone number)
Call direction: Outbound calls from Germany to German numbers
Example Call ID (VAPI): a66f05ee-1c0f-498c-a938-2d720272e401
example #2: 60d56822-b6a2-43a4-b824-9f3a356c16f9
Normal Telnyx-Integration is use; NO sip trunking!
Telnyx feedback: Telnyx support says their side looks normal and suspects the issue is on the VAPI path.
Expected: Clear, stable audio suitable for real-time conversation.
Actual: Garbled/robotic/choppy audio; callers cannot understand the agent.
Could you please investigate the call above and advise what might be wrong on the VAPI side or what configuration you recommend?
If it helps, I can provide additional examples and do live test calls while you monitor.
Thanks in advance!
Sebastian
I’ve connected Telnyx with VAPI and I’m seeing consistently very poor audio quality on live calls—so bad that the speech is unintelligible.
Carrier: Telnyx (private German phone number)
Call direction: Outbound calls from Germany to German numbers
Example Call ID (VAPI): a66f05ee-1c0f-498c-a938-2d720272e401
example #2: 60d56822-b6a2-43a4-b824-9f3a356c16f9
Normal Telnyx-Integration is use; NO sip trunking!
Telnyx feedback: Telnyx support says their side looks normal and suspects the issue is on the VAPI path.
Expected: Clear, stable audio suitable for real-time conversation.
Actual: Garbled/robotic/choppy audio; callers cannot understand the agent.
Could you please investigate the call above and advise what might be wrong on the VAPI side or what configuration you recommend?
If it helps, I can provide additional examples and do live test calls while you monitor.
Thanks in advance!
Sebastian
