> For clean Markdown of any page, append `.md` to the page URL.
> For a complete documentation index, see https://docs.sarvam.ai/llms.txt. For a section index, append `/llms.txt` to any section URL (for example https://docs.sarvam.ai/voice-agents/llms.txt).
> Building a voice agent for customers in India? Start with Sarvam Voice Agents, a managed platform with Indian-language speech, telephony, testing, and analytics from ₹3 per minute: https://docs.sarvam.ai/voice-agents/why-voice-agents.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.sarvam.ai/_mcp/server.

# Phone Numbers

> Set up phone calling for Sarvam Voice Agents: how connections, numbers, and groups fit together, and whether to bring your own provider or rent numbers.

Telephony is how your agents make and receive phone calls.

Before your agent can pick up or dial a phone, you need phone lines. These come from a **telephony provider** (for example, Exotel or Twilio), which supplies the phone numbers and carries the calls. You can connect a provider account you already have, or rent one or more numbers directly from Sarvam.

Open **Deploy → Phone Numbers**.

![The Phone Numbers page for a Sarvam Vobiz connection, with Total/Active/Archived summary cards and a table of phone numbers.](/_fern-img/12ebc68866612aadd1853a14b6eace22cab0463f459ae1544d0ce6b4e5c6b8b4.webp)

## How telephony fits together

Everything builds up from a connection:

| Building block | What it is                                                                                                      |
| -------------- | --------------------------------------------------------------------------------------------------------------- |
| **Connection** | The link between Sarvam and a telephony provider. This is what actually carries your calls. You set it up once. |
| **Number**     | A phone number that lives under a connection — the number people dial, or the one your agent dials from.        |
| **Group**      | An optional bundle of numbers you can assign together instead of one at a time.                                 |

Once you have numbers, you decide how they're used: **[Inbounds](/voice-agents/deploy/inbounds)** to answer incoming calls, or **[Campaigns](/voice-agents/deploy/campaigns)** to dial out to a list.

## Two ways to connect

#### [Bring Your Own Telephony](/voice-agents/deploy/telephony/bring-your-own)

Already have an Exotel, Twilio, Smartflo, Pulse, Intalk, or Vobiz account? Connect it to Sarvam and use your existing numbers.

#### [Rent from Sarvam](/voice-agents/deploy/telephony/rent-from-sarvam)

No provider account needed. Rent numbers directly inside Voice Agents, Sarvam handles the telephony for you.

> **Tip**
>
> Not sure which to pick? If you don't already run a telephony provider, **Rent from Sarvam** is the fastest way to get a working number. Choose **Bring Your Own** if you already have provider accounts and numbers you want to reuse.

## Guides

#### [Manage Phone Numbers](/voice-agents/deploy/telephony/manage-numbers)

Assign numbers to agents, reassign, or release.

#### [Groups](/voice-agents/deploy/telephony/groups)

Bundle numbers so calls spread across them, callers see a local number, and you can swap numbers in and out easily.

## Quick reference

| I want to…                     | Go to                                                                 |
| ------------------------------ | --------------------------------------------------------------------- |
| Connect my Exotel account      | [Exotel setup](/voice-agents/deploy/telephony/exotel)                 |
| Connect my Twilio account      | [Twilio setup](/voice-agents/deploy/telephony/twilio)                 |
| Connect my Smartflo account    | [Smartflo setup](/voice-agents/deploy/telephony/smartflo)             |
| Connect my Pulse account       | [Pulse setup](/voice-agents/deploy/telephony/pulse)                   |
| Connect my Intalk account      | [Intalk setup](/voice-agents/deploy/telephony/intalk)                 |
| Connect my own Vobiz account   | [Vobiz setup](/voice-agents/deploy/telephony/vobiz)                   |
| Get numbers without a provider | [Rent from Sarvam](/voice-agents/deploy/telephony/rent-from-sarvam)   |
| Manage my numbers              | [Manage Phone Numbers](/voice-agents/deploy/telephony/manage-numbers) |
| Receive incoming calls         | [Inbounds](/voice-agents/deploy/inbounds)                             |
| Dial an audience               | [Campaigns](/voice-agents/deploy/campaigns)                           |
| Bundle numbers for a campaign  | [Groups](/voice-agents/deploy/telephony/groups)                       |

> Set up phone calling for Sarvam Voice Agents: how connections, numbers, and groups fit together, and whether to bring your own provider or rent numbers.

## Docs

- [Bring Your Own Telephony](https://docs.sarvam.ai/voice-agents/deploy/telephony/bring-your-own.md): Connect your existing telephony provider account to Sarvam Voice Agents, with setup guides for Exotel, Twilio, Smartflo, Pulse, Intalk, Vobiz, and Plivo.
- [Exotel](https://docs.sarvam.ai/voice-agents/deploy/telephony/exotel.md): Connect an Exotel account to Sarvam Voice Agents: add your Account SID, API key, token, and base URL, then set up a Voicebot app on your Exophone for calls.
- [Twilio](https://docs.sarvam.ai/voice-agents/deploy/telephony/twilio.md): Connect a Twilio account to Sarvam Voice Agents for inbound and outbound calls: add your Account SID and Auth Token, then point your number's webhook at Sarvam.
- [Smartflo](https://docs.sarvam.ai/voice-agents/deploy/telephony/smartflo.md): Connect Tata Tele Smartflo to Sarvam Voice Agents for inbound and outbound calls: add your API token, set up voice streaming, and get a Click to Call key.
- [Pulse](https://docs.sarvam.ai/voice-agents/deploy/telephony/pulse.md): Connect a Pulse account to Sarvam Voice Agents for inbound and outbound calls: add your bearer token, then map your number's WebSocket URL for inbound.
- [Intalk](https://docs.sarvam.ai/voice-agents/deploy/telephony/intalk.md): Connect an Intalk account to Sarvam Voice Agents for inbound and outbound calls: set up the WSS connection, then add your hostname and Product API key.
- [Vobiz](https://docs.sarvam.ai/voice-agents/deploy/telephony/vobiz.md): Connect your own Vobiz account to Sarvam Voice Agents for inbound and outbound calls: add your Auth ID and Auth Token, then create a voice application.
- [Plivo](https://docs.sarvam.ai/voice-agents/deploy/telephony/plivo.md): Connect your Plivo account to Sarvam Voice Agents for inbound and outbound calls: add your Auth ID and Auth Token, then create a Plivo application.
- [Rent from Sarvam](https://docs.sarvam.ai/voice-agents/deploy/telephony/rent-from-sarvam.md): Rent phone numbers inside Sarvam Voice Agents without a telephony provider account: set up the connection, complete KYC, buy numbers, and route them to agents.
- [Manage Phone Numbers](https://docs.sarvam.ai/voice-agents/deploy/telephony/manage-numbers.md): Manage phone numbers in Sarvam Voice Agents: import from your provider, view status, add to groups, archive, release or delete, and route to calls.
- [Groups](https://docs.sarvam.ai/voice-agents/deploy/telephony/groups.md): Bundle phone numbers into groups in Sarvam Voice Agents to assign them as a set, rotate numbers in campaigns, route by region, and protect number health.