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Vobiz SIP Integration Guide — QCall SIP Dialer (Inbound + Outbound)

• Part A — Vobiz side: buy a number, create a trunk, generate SIP credentials, and get the values QCall needs.
• Part B — QCall side: add the SIP Dialer in the QCall dashboard, then finish the inbound loop-back on Vobiz.

You need one thing from each side. Vobiz gives you a SIP domain + username + password + phone number. QCall gives you back a LiveKit SIP URI that Vobiz must forward inbound calls to. That two-way handshake is the whole integration.

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How it works (architecture)

                         ┌─────────────────────────────────────────────┐
                         │                  QCall                        │
                         │  (LiveKit SIP trunks + AI agent backend)      │
                         └─────────────────────────────────────────────┘
   OUTBOUND  ─────────────────────────────►
   AI agent dials a lead:                       LiveKit Outbound Trunk
   QCall → Vobiz SIP domain (termination) ────► sends INVITE to
   authenticated with username/password         {trunk}.sip.vobiz.ai ──► PSTN ──► Lead's phone

   INBOUND   ◄─────────────────────────────
   Caller dials your Vobiz DID number ──► Vobiz ──► routes (origination URI) to
   your QCall LiveKit SIP URI  ────────────────► LiveKit Inbound Trunk (matches the number)
                                                 ──► Dispatch Rule ──► AI agent answers

• Outbound = QCall → Vobiz. From QCall’s point of view, Vobiz is where the call terminates into the phone network. That is why QCall calls it the SIP Termination URI.
• Inbound = Vobiz → QCall. Vobiz must be told to originate the incoming call toward QCall’s LiveKit SIP address.

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Credential cheat-sheet (Vobiz → QCall field mapping)

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Part A — Vobiz: get your SIP credentials & number

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Step 1 — Create your Vobiz account

1. Register at https://console.vobiz.ai (new accounts get free trial credit).
2. After login, open the dashboard. Note your account-level Auth ID and Auth Token — these authenticate any Vobiz API calls. (You don’t paste these into QCall; they’re only for managing Vobiz itself.)

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Step 2 — Buy a phone number (DID)

1. In the Vobiz console, go to the DID / Phone Numbers section.
2. Filter by country/region and pick a number that supports Voice (inbound + outbound).
3. Purchase it. This number is your caller ID for outbound and your ring-in number for inbound.
4. Record it in E.164 format with the + and country code — e.g. +919876543210. → This becomes the Phone Number field in QCall.

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Step 3 — Create a SIP trunk

1. Go to Trunks in the sidebar and click Create.
2. Give it a name (e.g. qcall-trunk) and set the trunk type to support both directions (you’ll use it for outbound termination and inbound origination).
3. On save, Vobiz auto-provisions a unique SIP domain in the form {trunk_id}.sip.vobiz.ai (e.g. abc123.sip.vobiz.ai). → This becomes the SIP Termination URI in QCall.

Default trunk settings (transport udp, CPS limit, status active) are fine to start. You can tune concurrency/CPS later.

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Step 4 — Create SIP credentials (username + password)

1. Open your trunk → Credentials → Create Credential.
2. Set a username (e.g. qcall_prod) and a strong password (12+ chars, mixed case, digits, symbols).
3. Copy the password now — Vobiz stores it hashed and will never show it again. If you lose it, you must create a new credential. → Username + password become SIP Username and SIP Password in QCall.

Vobiz also supports IP-based auth. QCall authenticates with username/password, so credential auth is required. (You may additionally IP-whitelist LiveKit’s egress IPs for defense-in-depth, but it’s optional.)

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Step 5 — Attach your DID to the trunk

1. Go to your DID number’s settings and associate it with the trunk you created in Step 3.
2. Leave the inbound destination for now — you’ll point it at QCall in Part C, after QCall gives you the LiveKit SIP URI.

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Part B — QCall dashboard: add the SIP Dialer

1. Log in to the QCall dashboard.
2. Go to Settings → Dialers (the “Dialers” / “Phone Numbers” area).
3. Click ➕ Add Dialer and choose SIP as the dialer type.
4. Fill in the form using your cheat-sheet:

   Field	What to enter
   Dialer Name	Any label, e.g. My Vobiz Line
   Phone Number	Your Vobiz DID in E.164, e.g. +919876543210
   SIP Termination URI	Your Vobiz SIP domain, e.g. abc123.sip.vobiz.ai
   SIP Username	The Vobiz credential username, e.g. qcall_prod
   SIP Password	The Vobiz credential password (paste the one you copied)

5. Click Create / Save.

• Creates a LiveKit outbound trunk → sends outbound calls to your Vobiz SIP domain, authenticated with your username/password, using your DID as caller ID.
• Creates a LiveKit inbound trunk → matched to your DID number.
• Creates a dispatch rule → routes incoming calls on that number to your AI agent.

If you don’t see the SIP URI in the UI, it’s a fixed value for your QCall workspace — ask QCall support and they’ll provide your LiveKit SIP domain.

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Part C — Vobiz: finish the inbound loop-back

1. Return to the Vobiz console → your trunk (or DID) → inbound routing settings.
2. Set the inbound destination / origination URI to your QCall LiveKit SIP URI from Part B.
   • Enter it without the sip: prefix, e.g. myproj-x1y2.sip.livekit.cloud.
   • If Vobiz asks for a full URI format, use sip:myproj-x1y2.sip.livekit.cloud:5060.
3. Make sure the DID from Step 2 is the number bound to this inbound route.
4. Save.

• Outbound: QCall → abc123.sip.vobiz.ai (your Vobiz trunk) → PSTN.
• Inbound: Caller → your DID → Vobiz → myproj-x1y2.sip.livekit.cloud (QCall) → AI agent.

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Testing

1. In QCall, assign the new SIP dialer to a campaign or a Playground test call.
2. Place a call to your own mobile. It should ring with your Vobiz DID as caller ID and the AI agent should speak when you answer.

1. From any phone, call your Vobiz DID number.
2. It should connect to your AI agent (assign an inbound assistant to this dialer/number in QCall first).

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Troubleshooting

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Sources

• Vobiz Quick Start
• Vobiz — Create a Trunk
• Vobiz — Trunk Credentials
• Vobiz — LiveKit Integration
• Vobiz — Origination URIs