national-gold•3mo ago
Need help connecting Asterisk to VAPI SIP for incoming GSM calls from GOIP
Hi everyone,
I’m currently integrating a GOIP device (Dinstar with GSM SIM card) with VAPI so that all incoming GSM calls are handled by my VAPI voice assistant.
Here’s what I’ve done so far:
- ✅ GOIP is successfully registered as a SIP endpoint on my Asterisk server.
- ✅ Asterisk shows the GOIP as "Available" with
pjsip show endpoints.
- ✅ I have a working assistant configured on my VAPI account.
My goal:
➡️ When someone calls my GSM SIM (in GOIP), the call reaches Asterisk, which should then forward the call to my assistant via VAPI (SIP).
What I need:
I’m looking for a working example of how to connect Asterisk to VAPI using SIP (pjsip.conf and extensions.conf). I have my assistant ID and API key, but I’m not sure:
- How to generate the SIP URI or SIP trunk inside VAPI.
- What to put in the pjsip.conf and extensions.conf to make this work.
Any help or working config examples would be greatly appreciated 🙏
Thanks in advance!3 Replies
To connect Asterisk to VAPI SIP:
1. Create a SIP URI in VAPI: Use the VAPI dashboard or API to create a SIP phone number with a URI like
What version of Asterisk are you using, and do you already have a working SIP trunk config that we can build on? Sources: - VAPI SIP Integration Guide - VAPI SIP Trunk Guide
sip:your_username@sip.vapi.ai and assign your assistant (docs).
2. Asterisk Setup: In pjsip.conf, define an endpoint pointing to sip.vapi.ai. In extensions.conf, route incoming calls to this SIP URI.
The documentation does not provide a full Asterisk config example, so you may need to adapt a generic SIP trunk setup.
Clarifying question:What version of Asterisk are you using, and do you already have a working SIP trunk config that we can build on? Sources: - VAPI SIP Integration Guide - VAPI SIP Trunk Guide
⤵️ Mention @Vapi Support Bot for follow-ups 🐥
national-goldOP•3mo ago
I’m using Asterisk version 20 (installed from latest ISO).
My GOIP GSM gateway is already connected to Asterisk and I can see it with pjsip show endpoints as Available.
I now want to forward incoming calls from GOIP to VAPI via SIP.
I haven’t yet configured the SIP trunk to VAPI. Could you help me write the correct pjsip.conf and extensions.conf entries for that?
My VAPI SIP URI is: sip:dinstarvapi@sip.vapi.ai
Hey, writing pjsip.conf is outside our scope of work. Please send the traffic to sip:number@credential_id.sip.vapi.ai and ask ChatGPT to write it for you.