Connect your own GSM & run two-way AI calls

Follow this guide top to bottom. When you finish, you can dial any mobile number from the dashboard, the call goes out over your own SIM cards, and the AI agent talks with the person on the other end in real time — both directions.

How it works

You run a small edge box (a cheap Ubuntu machine or VM) on the same local network as your Dinstar GSM gateway. The edge box dials a secure WireGuard tunnel out to our server — so nothing on your network is ever exposed to the internet. Over that tunnel we place calls through your SIMs and stream the audio to/from the AI.

The three pieces you touch: Edge box one install script · Dinstar its own web UI · Portal Settings → Telephony.

0 · What you need

1 · Your server values

These are this server's live WireGuard hub values. You'll paste them into the edge box install. Keep this tab open.

2 · Get the setup bundle

On the edge box, download and unpack the bundle. It contains the one-shot installer setup.sh plus the Asterisk config templates it needs.

# on the edge box (Ubuntu 24.04), as a normal user
curl -fsSLO https://demo.voais.in/downloads/voais-edge-setup.tar.gz   # or use the button above
tar -xzf voais-edge-setup.tar.gz
cd asterisk
ls   # setup.sh  pjsip.conf  extensions.conf  manager.conf  ari.conf  http.conf  rtp.conf

3 · Install the edge box

Run the installer as root. It installs Asterisk 20 + WireGuard + a firewall, deploys the configs, and brings up the tunnel — all in one go. It is safe to re-run.

sudo SAAS_HUB_PUBKEY='tYDyd+7fNwsfV/qj4J3GEJc890U0RX7yNvLIYlGtBkg=' \
     SAAS_ENDPOINT='145.223.22.231:51820' \
     ./setup.sh

It will ask for a few things (press Enter to accept the detected defaults):

When it finishes it prints a summary card (also saved to voais-setup-summary.txt on your Desktop / home folder) containing your AMI/ARI credentials and — most importantly — this box's WireGuard public key:

# shown in the summary, and also here:
sudo cat /etc/wireguard/box.pub
# e.g.  Ki9c…long…base64…=  

4 · Connect the tunnel (portal)

This is the link between your box and our server. In the portal go to Settings → Telephony → WireGuard tunnel:

sudo SAAS_HUB_PUBKEY='tYDyd+7fNwsfV/qj4J3GEJc890U0RX7yNvLIYlGtBkg=' \
     SAAS_ENDPOINT='145.223.22.231:51820' \
     TENANT_OVERLAY_IP='10.66.0.10' \    # ← the IP the portal gave you
     ./setup.sh --yes

Verify the tunnel is live (a recent handshake = connected):

sudo wg show
# look for:  latest handshake: a few seconds ago
ping -c2 10.66.0.1          # the hub should answer over the tunnel

5 · Configure the Dinstar gateway

Open the Dinstar's web UI in a browser at http://<dinstar-ip> (default login is on the device label, often admin / admin). This is the Dinstar's own software — not Asterisk. Set up four things:

5.1 — SIP trunk to the edge box

Point the Dinstar at Asterisk so calls flow between them.

5.2 — IP → Tel routing (outbound: portal → SIM)

Map our dial prefix to the SIM port. The prefix tells the Dinstar which SIM to use, then it is stripped before the real number is dialled.

5.3 — Tel → IP routing (inbound: SIM → portal)

So incoming GSM calls reach Asterisk: route any GSM port → the edge box IP :5060, with no number manipulation.

5.4 — Insert SIMs

• Put each SIM in the port you mapped above (port 30, 31, …).
• Disable the SIM PIN (do this in a phone first if needed).
• Confirm each port shows Registered / Idle with signal on the Dinstar status page.

6 · Portal: Telephony + SIMs

If you used Connect / Enroll in step 4, most of this is already filled. Open Settings → Telephony, set Mode = Bring Your Own (self), and confirm these values (replace 10.66.0.10 with the overlay IP you were assigned):

Click Save, then go to Settings → SIMs and add one row per SIM:

7 · Test & go live

Climb this ladder — each rung proves the layer below it works.

Rung 1 — connection test (AMI)

In Settings → Telephony click Test. Expect ok. A failure here is almost always a firewall block or a wrong AMI user/secret.

Rung 2 — echo call (no AI key needed)

This proves the whole audio path end-to-end without any AI. Dial yourself:

POST /api/calls/dial
{ "number": "<your mobile>", "mode": "ai" }

Answer the call — you should hear your own voice looped back. That confirms: originate → Dinstar → SIM → GSM → your phone → audio back over the tunnel to our server and out again.

Rung 3 — real two-way AI

Set an AI provider key on the server (one of these in the app .env, then restart):

HIDROGEN_API_KEY=...     # or OPENAI_API_KEY / GEMINI_API_KEY
AI_DEFAULT_MODEL=hidrogen-live

Dial again. Now the AI greets the person, listens, and replies — and you can barge in (start talking and the AI stops to listen). Transcripts and call events fill in under Call History. You are live.

8 · Changing things later

9 · Troubleshooting

Still stuck? Grab voais-setup-summary.txt (on your Desktop / home folder) and the output of sudo wg show + sudo asterisk -rx "pjsip show endpoints" and contact support.

API reference (optional)

Everything in the portal is also an API call (send your session token as a Bearer header).