Hi Team, We experienced an issue today affecting outbound calls across multiple organizations and multiple providers added via BYO SIP Trunk Number. Between 16:30 and 18:05 Turkey time, all outbound calls failed with the following errors: > call.start.error-get-transport — Error setting up the call transport > > An error occurred in this call: call.start.error-get-transport Couldn't Create SIP Call. At the moment, the issue appears to be resolved. Could you please provide a detailed explanation of the root cause of this incident? This outage created a serious operational impact for our active customers. We would appreciate your clarification on the following points: - What was the exact cause of the problem? - Is there anything we, as developers, can do to reduce the risk of this happening again? - Are there any preventive actions or safeguards that will be implemented on your side? We would appreciate a detailed update and your recommendations. Thank you.

Thanks for the update glad to hear it’s resolved now. From what you’re describing, this looks like a transient SIP transport or upstream provider routing issue affecting the BYO trunk layer across multiple orgs, not something isolated to your setup. Those “error-get-transport / couldn’t create SIP call” failures usually point to a temporary breakdown in session setup between Vapi and the SIP gateway. I’d recommend escalating this for an official RCA, because only the platform can confirm whether it was a provider outage, routing misconfig, or internal transport service degradation. I can also help you draft a follow-up or put monitoring in place so you can detect this earlier next time. @Yavuz Kömeçoğlu

Okay, I can set up a monitoring and tracking system to stay informed, but my awareness doesn't solve anything. Because I don't have the chance to intervene. It's not something under my control. And a short, momentary outage is acceptable, but such a long-term outage is very damaging to trust and also puts me in a difficult position with my customers. This situation created a big problem for us in the live environment. VAPI must provide a stable infrastructure. It's a very important issue.