VAPI•2mo ago

All Calls failing with call.in-progress.error-providerfault-transport-never-connected

Getting these issues for our calls with VAPI numbers and with Twilio numbers. Can someone please help?

Here are some call IDs with this issue:
019aa43a-19e4-7009-93f0-de7668813afc
019aa439-4d95-7115-8106-76b86ba91b02
019aa438-95b2-7223-9c69-3c473e8f4c12

Vapi Support BotAPP•11/21/25, 2:37 AM

The error call.in-progress.error-providerfault-transport-never-connectedcall.in-progress.error-providerfault-transport-never-connected means your call provider (like Twilio) failed to establish a connection, often due to provider-side issues.
The best next step is to contact Vapi support with your call_idcall_id and account email for investigation.

Please email support@vapi.ai with your call IDs and a description of the issue.

Please email support@vapi.ai with your call IDs and a description of the issue.

This will help the team review provider logs and assist you directly.
Reference: Vapi call ended reason documentation

Source:

Vapi call ended reason documentation

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

awake-maroon•11/21/25, 2:37 AM

I am having the same error.

colossal-harlequin•11/21/25, 2:37 AM

Same

awake-maroon•11/21/25, 2:39 AM

Twilio returns the error of: 31901 - Stream - WebSocket - Connection Timeout

colossal-harlequin•11/21/25, 2:39 AM

Same

awake-maroon•11/21/25, 2:39 AM

rip :/

sad-indigoOP•11/21/25, 2:40 AM

Wow, all of you having these issues too.

sad-indigoOP•11/21/25, 2:40 AM

Unacceptable prod issues

awake-maroon•11/21/25, 2:40 AM

broad-salmon•11/21/25, 2:43 AM

Same issue…. My clients are NOT happy

colossal-harlequin•11/21/25, 2:44 AM

Seems to be fine now for me

sad-indigoOP•11/21/25, 2:46 AM

Working now too.

sad-indigoOP•11/21/25, 2:46 AM

Unbelieveable that it happened and no public status/comms for it.

Ssad-indigo Unbelieveable that it happened and no public status/comms for it.

broad-salmon•11/21/25, 3:21 AM

Agree…. Has this been a common thing?

broad-salmon•11/21/25, 3:22 AM

Because my clients were not happy and if it is, I’d look at other providers

sad-indigoOP•11/21/25, 6:32 PM

not confident or happy with VAPI. likely will switch for find another solution.

VapiAPP•11/25/25, 2:29 AM

Thanks for reporting this issue. Our team noticed some degradation in our SIP server around the time this ticket was submitted, and they resolved the issue immediately. Calls should now be connecting normally.

Please let us know if you see this happen again — we’ll be happy to investigate further.

All Calls failing with call.in-progress.error-providerfault-transport-never-connected

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