> ## Documentation Index
> Fetch the complete documentation index at: https://www.bolna.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Connect Vobiz to Bolna with a SIP trunk

> Bring your Vobiz numbers to Bolna over SIP: create inbound and outbound trunks in the Vobiz Console, then a Vobiz SIP trunk in Bolna.

[Vobiz](https://vobiz.ai/) is an Indian telephony provider. Vobiz uses an outbound trunk for the calls Bolna places and an inbound trunk for calls to your numbers, so you create both in Vobiz and connect them to a single trunk in Bolna.

> [!NOTE]
>
> This page connects Vobiz over a SIP trunk. To connect your Vobiz account to Bolna as a telephony provider instead, see [Using Vobiz](https://www.bolna.ai/docs/vobiz).

## Before you begin

* **A Vobiz account with balance and at least one Vobiz phone number.**

## Set up Vobiz

**1. Create the outbound trunk**

In the [Vobiz Console](https://console.vobiz.ai/), open **SIP Trunk** → **Outbound Trunks** and click **+ Create New Trunk**. Enter a **Trunk Name**. Under **Authentication & Linking**, add one way for Vobiz to recognise Bolna:

* **Credentials List:** create a credential with a username of letters, digits, underscores or hyphens, and a password of 5 to 20 characters with at least one of `~!@#$%^&*()_+`. Save both; Vobiz does not show the password again.
* **IP Access Control List:** create one with Bolna's signalling IPs `15.252.21.46` and `13.206.230.198`.

Click **Create Trunk** and copy the trunk's **SIP Domain**, for example `aabbccdd.sip.vobiz.ai`. Use this exact domain, not `sip.vobiz.ai`.

**2. Add Bolna as an origination URI**

Open **SIP Trunk** → **Inbound Trunks** → **Origination URI** and click **+ Add Origination URI**:

| Field | Value |
| - | - |
| URI | `trunk.bolna.ai:5060` |
| Transport | `UDP` or `TCP`, not TLS |

Click **Create URI**.

**3. Create the inbound trunk and link your numbers**

Open **SIP Trunk** → **Inbound Trunks** and click **+ Create New Trunk**. Enter a **Trunk Name**, pick the origination URI from the previous step as the **Primary URI** and click **Create Trunk**. Open the trunk, click **Link Numbers** under **Linked Numbers** and pick your Vobiz numbers.

## Create the trunk in Bolna

**1. Pick Vobiz**

In the sidebar, under **Deploy**, open **SIP Trunks** and click **Create trunk**. If your account still has legacy SIP trunks, click **Open new SIP trunks** first. On the **Provider** step, pick **Vobiz**, enter a **Trunk name** and the number of **Channels**, and paste the SIP Domain into **Gateway we dial**. Click **Continue**.

**2. Add Vobiz's IPs and credentials**

On the **Carrier IPs** step, add the addresses Vobiz sends inbound calls from. Vobiz [publishes](https://vobiz.ai/docs/concepts/ip-whitelisting) these as its origination sources:

* `13.233.44.61`
* `3.111.255.163`
* `3.111.128.110`

Vobiz notes that this set can grow, so check its page if inbound calls are refused. If you created a credential, enter its **Username** and **Password** under **Carrier credentials (optional)**. Click **Continue**.

**3. Add your Vobiz numbers**

On the **Numbers** step, enter each Vobiz number in E.164 format, for example `+91XXXXXXXXXX`, and click **Add**. Click **Continue**, check the summary and click **Create trunk**.

For every field on these steps, see [Connect your carrier](https://www.bolna.ai/docs/sip-trunking/connect-carrier.md).

## Assign an agent and test

* **Inbound:** open the trunk's **Numbers** tab and, in the **Agent** column, pick an agent for your Vobiz number. Then call the number. See [Receive inbound calls](https://www.bolna.ai/docs/sip-trunking/inbound-calls.md).
* **Outbound:** on the agent's **Calling** tab, set **Telephony Provider** to **SIP Trunk**. In the agent's outbound call dialog, pick your Vobiz number as the caller ID, enter the number to call and click **Place call**. See [Make outbound calls](https://www.bolna.ai/docs/sip-trunking/outbound-calls.md).

If a call does not connect, see [Troubleshooting](https://www.bolna.ai/docs/sip-trunking/troubleshooting.md).


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