Hello, We have set up a BYO SIP Trunk and are currently testing inbound calls. According to the call log, the inbound call is successfully received, but during the actual call, the agent’s voice cannot be heard. Upon checking, we found that the media stream IP is 35.89.67.171. Based on the documentation, SIP signaling and media streams should be handled through 44.229.228.186/32 or 44.238.177.138/32, so we configured the firewall to allow these two IP addresses. However, it seems that the media stream is being connected through a different IP address. Could you please advise how we can resolve this issue?

same issue observed also on my issue when i configure external server issue occured the vapi own voice agent activated saying Welcome to A2z sms service

@makemyflights | Ø,G @김민우 VAPI uses the signalling IP numbers to load balance the audio streams and calls to various other servers. When a call is received at these IPs, it will be forwarded internally - and the audio stream may come back from a completely different IP at the end. If you need to pin-down your media and signalling, I suggest that you setup an SBC in a DMZ network on your side to enable it.

Thanks i am switching from vapi, crap software no support, all buggy

@makemyflights | Ø,G I think you are too harsh, every software has its issues here and there - and knowing VAPI, they do alot of work to make sure it good.

Hi, could you please share a call Id where this issue occurs? We would like to review the logs

The call id is d2338a46-2d5b-4203-88fa-726dc05e120e. Thanks !!

Thank you for providing this information. We’ll be looking into it further to better understand the situation and determine the next steps. Our team will update you as soon as we have more details, and we truly appreciate your patience and cooperation in the meantime.

Hello, if the root cause of the issue and the resolution plan have been analyzed, could you please provide me with a response?

Of course! We will let you know. Ae truly appreciate your patience and cooperation in the meantime.