# Configure outbound trunks for emergency calling

Configure outbound trunks to route emergency calls through DIDWW using verified DID numbers with active Emergency
Calling Services, even if Outbound Termination is not enabled on your account.
You can allow all eligible DID numbers on a trunk, or only selected ones.
By default, all existing outbound trunks are set to **Allow all available DID(s) for emergency calling** once the
Emergency Calling Service has been activated.

Important

- If **Outbound Termination** is not activated, outbound trunks can be used **only for emergency calls** from verified DID source numbers.
- Voice termination to local and international destinations will remain restricted until Outbound Termination is enabled.
- To activate outbound termination services, see [Get Access to Local and International Voice Termination](../../outbound-trunks/get-access.html#user-panel-voice-out-get-access).

## Before you begin

- At least one verified **Emergency Calling Service**, in **Active** or **Pending update** status, is required. See [Create an emergency calling service](create-emergency-calling-service.html).
- An outbound trunk is required. See [Create an outbound trunk](../../outbound-trunks/how-to-guides/create-outbound-trunk.html). When you create a trunk, **Allow all available DID(s) for emergency calling** is enabled by default.

## Step 1: Edit the outbound trunk

1. In the DIDWW User Panel, go to **Voice > Outbound Trunks**.
2. Click **Actions** next to the trunk you want to update.
3. Select **Edit** from the dropdown menu.

You can also click the trunk name to open the edit page.

[![Editing an existing outbound trunk from the DIDWW User Panel](../../../_images/edit_existing_1.png)](../../../_images/edit_existing_1.png)


**Fig. 1.** Opening the Edit page for an existing outbound trunk

## Step 2: Choose the DIDs allowed for emergency calling

Expand the **Emergency Calling** section, then use one of the following options.
Field definitions are listed in [Emergency
Calling](../../outbound-trunks/outbound-trunk-reference.html#outbound-trunk-create-emergency).

### Allow all available DIDs

Turn on **Allow all available DID(s) for emergency calling**.
All verified source numbers with active Emergency Calling Services can then be used as the caller ID for emergency calls
through this trunk.

### Allow selected DIDs

1. Disable the **Allow all available DID(s) for emergency calling** toggle to choose specific numbers manually.
2. Use the **filters** or search options in the **Available CLI(s)** section to find the desired DID number(s).
3. Select the DID(s) and click the **right arrow ( > )** button to move them to the **Allowed CLI(s)** section.

Important

The **Available CLI(s)** list displays only DID numbers with an **active Emergency Calling Service**.

[![Selecting specific DIDs for emergency calling in the outbound trunk configuration](../../../_images/edit_existing_outbound.gif)](../../../_images/edit_existing_outbound.gif)


**Fig. 2.** Selecting and allowing specific DIDs for emergency calling

After choosing an option, click **Submit** to save your configuration.

## Step 3: Verify Emergency Calling CLI(s)

If the trunk uses **Credentials & IP-Based** authentication, open its credentials window as described in [View outbound
trunk credentials](../../outbound-trunks/how-to-guides/view-outbound-trunk-credentials.html).
In the **Emergency calling CLI(s)** field, you will see either a list of allowed numbers or **Any**, which indicates
that all DIDs with active Emergency Calling Services can be used for emergency calls.

[![Outbound trunk credentials window showing the Emergency calling CLI(s) field](../../../_images/create_new_outbound_trunk_4.png)](../../../_images/create_new_outbound_trunk_4.png)


**Fig. 3.** Viewing and verifying Emergency Calling CLI(s) for the outbound trunk

For trunks with other authentication methods, check the **Emergency Calling** section on the trunk's edit page instead.

## Related resources

- [Create an outbound trunk](../../outbound-trunks/how-to-guides/create-outbound-trunk.html) - Create a trunk if you do not have one yet.
- [View outbound trunk credentials](../../outbound-trunks/how-to-guides/view-outbound-trunk-credentials.html) - Find the trunk credentials and signaling endpoints.
- [Outbound trunk Emergency Calling fields](../../outbound-trunks/outbound-trunk-reference.html#outbound-trunk-create-emergency) - Look up the emergency calling fields of an outbound trunk.
- [Emergency number dialing reference](../supported-emergency-numbers.html) - Find the emergency numbers to dial in each country.