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

# Add your SIP

> Connect your own SIP trunk for inbound or outbound calling.

Connect your own SIP trunk to place or receive calls without going through Twilio.

<Tabs>
  <Tab title="Outbound">
    Route outbound calls through your own SIP trunk instead of a purchased number.

    <Steps>
      <Step title="Open SIP settings">
        In the dashboard, open the SIP number settings.
      </Step>

      <Step title="Enter your trunk details">
        Enter your **SIP username**, **SIP password**, and **SIP URI**.
      </Step>

      <Step title="Set dial prefix rules, if needed">
        Configure dial prefix rules if your trunk requires specific number formatting for outbound calls.
      </Step>

      <Step title="Save">
        Save your SIP configuration so it's available as an outbound calling option.
      </Step>
    </Steps>
  </Tab>

  <Tab title="Inbound">
    Register your SIP trunk so AgentCallback can receive inbound calls through it.

    <Steps>
      <Step title="Open SIP settings">
        In the dashboard, open the SIP number settings.
      </Step>

      <Step title="Enter your registration details">
        Enter your **SIP username**, **password**, **proxy**, **outbound proxy**, and **auth user**. AgentCallback uses these to register with the platform's SIP endpoint on your behalf.
      </Step>

      <Step title="Restrict access, if needed">
        Optionally configure an IP allowlist and country prefix rules to control which sources can reach your inbound number.
      </Step>

      <Step title="Save">
        Save your SIP configuration and assign it an inbound agent.
      </Step>
    </Steps>
  </Tab>
</Tabs>

<Tip>
  Place a test outbound call after saving your SIP configuration to confirm your trunk is set up correctly before relying on it for real calls.
</Tip>

## Next step

[Preview voices](/voices/preview-voices) to choose how your agent sounds.