Hi @Vapi @Vapi Support Bot Team, I’ve configured a custom SIP trunk using Genesys (byoc.apse2.pure.cloud) and successfully created both the SIP trunk credential and associated phone number via your API. However, when I initiate an outbound test call, I receive a 201 Created response, but the call fails with the following error in logs: call.in-progress.error-sip-outbound-call-failed-to-connect There’s no further detail on the root cause, so I’m unable to debug from my end. This is urgent — can you please help me identify what’s failing in the SIP handshake or routing? one of the call id is : 7b6c0a50-601d-4f75-9be6-33c1c4c30660 Let me know if you need anything else form my side to investigate but please respond fast

Hey Sahil, for inbound calls your are getting 401 because VAPI requires authorization headers for inbound calls and your telephone is supposed to send username and password. Username is your SIP username, and password can be anything except empty white spaces. To forward the codes, they have to forward it to the SIP URI registered in VAPI, which is your phone number followed by @[sip.wapi.ai](http://sip.wapi.ai) unless customized. The outbound calls we are getting either 404 Not Found or 403 Forbidden which means both of the calls have failed from your telephoning end. I'll suggest you check out with them.