nightcrawler
03/25/2026, 8:39 PMVapi Support Bot
03/25/2026, 8:40 PMcall.in-progress.error-providerfault-transport-never-connected means your telephony provider failed to establish a connection.
- Next step: Log in to your telephony provider's dashboard (e.g., Twilio, Vonage, or SIP trunk) and review the connection logs for call ID 019d26b4-d7a4-733e-bb76-09e0c1df08d3.
If using a SIP trunk, also verify your network connectivity to Vapi's SBC.
This is typically a provider-side issue and not charged to your account ([see troubleshooting guide](https://docs.vapi.ai/calls/troubleshoot-call-errors)).
Source:
- [Troubleshoot call errors](https://docs.vapi.ai/calls/troubleshoot-call-errors)Adam
03/26/2026, 2:04 AMChiranjeet Mishra
03/31/2026, 11:34 AM