SIP Call Issue – Inbound Going to Voicemail, Outbound Call Tool Not Found Hey everyone — I’m setting up SIP integration for my voice agent using Vapi and running into two key issues: ❌ What’s Happening: 1. Inbound calls to my SIP number are going to voicemail — they’re not reaching my voice agent 2. Outbound calls are failing with this error: "Outbound Call Failed. Couldn't Get Tool, toolid [some_tool_id] Does Not Exist." ✅ What I’ve Done: Integrated a SIP trunk from a local Caribbean provider Used standard settings (UDP, PCMU/PCMA codecs, RFC2833 DTMF) Created a voice agent and assigned the SIP connection Double-checked auth, domain, and credentials (all correct) 🧠 Questions: What might cause inbound calls to skip Vapi entirely? What does the “Tool ID does not exist” error mean? Is it related to a missing config or voice agent? Appreciate any help or direction! – Andre

Hi Andre, For inbound calls, please confirm: Is your SIP provider configured to forward calls to the correct SIP URI (e.g.,

{your_number}@<credential_id>.sip.vapi.ai

) as required by Vapi? Incorrect routing is a common cause for calls skipping Vapi and going to voicemail ([Vapi SIP Trunking Guide](https://docs.vapi.ai/advanced/sip/sip-trunk)). For the outbound "Tool ID does not exist" error, this usually means the referenced tool is missing or not configured in your assistant ([Vapi Tools Documentation](https://docs.vapi.ai/tools)). Let me know about your SIP routing setup, and I can help further! Sources: - [Vapi SIP Trunking Guide](https://docs.vapi.ai/advanced/sip/sip-trunk) - [Vapi Tools Documentation](https://docs.vapi.ai/tools)

I just tested an outbound call from my assistant (YuhChat Scheduler), and the dashboard shows: > ✅ “Outbound Call Queued Successfully” However, the call is not being received on the destination number. No phone rings, no missed call appears — it looks like the call is being marked as sent, but nothing is actually happening on the recipient’s side. --- 🔍 Additional Info: Outbound Number: +1 876 504 3443 Assistant: YuhChat Scheduler Org ID: e1baa558-2927-49e6-b99e-3df31c48883e SIP Provider: IslandNet (Jamaica) No tool ID error now, but the call still doesn’t land --- Could you please check your logs or help me understand where the call might be getting stuck? Let me know if you need a call ID, timestamp, or PCAP file to assist. Thanks again for your help! https://cdn.discordapp.com/attachments/1385339583960584352/1385653640278315219/Screenshot_20250620_110011_Chrome.jpg?ex=6856da04&is=68558884&hm=9568ad914828021c00821a5dea58f8be33bd31dcd8203b7b0c26a12695bc4cab&

Hey! To help track down this issue, could you share: - The call ID This would really help us figure out what went wrong!

@axespire_57158 Sounds to me like your SIP provider requires SIP registration, which VAPI doesn't do. If you would like, I'll be happy to see if Cloudonix can help you resolve this issue. Feel free to DM me for more information.

Please let us know how you would like to proceed. Until then we will be on standby.