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

# Telephony

> Set up SIP trunks and phone-number connections in the SLNG Dashboard for outbound and inbound voice agent calls, including BYOC and managed providers.

Connect phone numbers to your voice agents for outbound and inbound calls. Telephony is configured in the [Telephony](https://app.slng.ai/telephony) section of the Dashboard.

## Outbound calling

Outbound calls require an outbound connection.

<Steps>
  <Step title="Create an outbound connection">
    Open [Create outbound connection](https://app.slng.ai/telephony/outbound/new) in the Dashboard and configure your trunk or provider.
  </Step>

  <Step title="Attach it to your agent">
    In **Agent Infra**, attach the outbound connection to the agent that will place calls.
  </Step>
</Steps>

<Note>
  Without an outbound connection, call dispatch via the API (`POST /v1/agents/{agent_id}/calls`) fails.
</Note>

## Inbound calling (optional)

To route inbound calls to a specific agent, create an inbound connection:

* [Create inbound connection](https://app.slng.ai/telephony/inbound/new)