> For the complete documentation index, see [llms.txt](https://docs.voipnumber.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.voipnumber.net/how-to/outbound-calls-to-pstn-mobile.md).

# Outbound calls to PSTN/mobile

## Overview

With a [Number](/components/number.md) you can make external calls to PSTN and mobile using a [Connection](/components/connection.md) or [Trunk](/components/trunk.md). 

Same [Number](/components/number.md) can be shared for outbound calls by any number of Trunks at the same time. 

Connections can't share a number. If a number is attached to a [Connection](/components/connection.md) it is inbound and outbound number of that [Connection](/components/connection.md) and can only be used by that [Connection](/components/connection.md), however it still can be used for making outbound calls by any number of Trunks.

Selected [Number](/components/number.md) appears as a caller number and displays as a Caller ID on a call.

Let's see how to configure this on your account.

## Outbound calling from Connection 

1. Go to your Connections tab at [app.voipnumber.net/connections](https://app.voipnumber.net/connections) and select or add a [Connection](/components/connection.md).
2. Go to `NUMBER` settings.
3. Select a [Number](/components/number.md) from a drop down.

<figure><img src="/files/QbqE3kYmeqhM3sSVh9V9" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/sIimLkBkhxEuhub6xiWw" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/tfZNakPFj2FiNg5uwmAy" alt=""><figcaption></figcaption></figure>

✅  You now have enabled your [Connection](/components/connection.md) to dial to PSTN and mobile through selected [Number](/components/number.md).

## Outbound calling through a Trunk&#x20;

1. Go to your Trunks tab at [app.voipnumber.net/trunks](https://app.voipnumber.net/trunks) and select or add a [Trunk](/components/trunk.md).
2. Enable `TRUNK OUT` on your trunk and switch mode toggle to `PSTN` .
3. Select a [Number](/components/number.md) from a drop down.

<figure><img src="/files/5QjohHBConKnI6lt6pES" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/9qeVeG2wRSVJaBiTPFr2" alt=""><figcaption></figcaption></figure>

✅  You now have enabled your [Trunk](/components/trunk.md) to dial to PSTN and mobile through selected [Number](/components/number.md).


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