# Manage SIP trunks

Manage existing inbound SIP trunks from the **Inbound Trunks** page. View a
trunk's configuration, edit its settings, enable CNAM lookup, or delete trunks
that are no longer required.

## Before you begin

- An active DIDWW account is required. [Sign in to DIDWW](https://my.didww.com/users/sign_in).
- An existing inbound SIP trunk is required. If you do not have one, see
  [Create a SIP trunk](create-sip-trunk.html).

## View a SIP trunk

1. In the DIDWW User Panel, go to **Voice > Inbound Trunks**.
2. Click the name of the SIP trunk.

[![Inbound Trunks page with the SIP trunk name highlighted to open its details](../../../../_images/view-trunk-name2.webp)](../../../../_images/view-trunk-name2.webp)


**Fig. 1.** Open the SIP trunk details

In **View Inbound SIP Trunk**, select a tab to review its settings, then click
**Close**. The page shows the trunk configuration in read-only mode. For a
**Dynamic Registration** trunk, it also shows the registration credentials and
registrar endpoints. See [View SIP registration credentials](view-sip-registration-credentials.html).

[![View Inbound SIP Trunk page showing read-only General settings for a Static Endpoint trunk](../../../../_images/view-trunk-details2.webp)](../../../../_images/view-trunk-details2.webp)


**Fig. 2.** Review the SIP trunk details

## Edit a SIP trunk

1. In the DIDWW User Panel, go to **Voice > Inbound Trunks**.
2. Locate the SIP trunk and open its **Actions** menu.
3. Click **Edit**.

[![Actions menu for an inbound SIP trunk with Edit available](../../../../_images/actions_edit3.png)](../../../../_images/actions_edit3.png)


**Fig. 3.** Open the SIP trunk edit form

4. In **Edit Inbound SIP Trunk**, update the required settings on any tab. The
   tabs match those on the creation form. See [Configure optional
settings](create-sip-trunk.html#create-sip-trunk-optional-settings) for guidance on the optional tabs.
5. Review the changes and click **Submit**.

For definitions, defaults, dependencies, and limits for all settings, see
[SIP trunk settings reference](../sip-trunk-settings-reference.html).

[![General settings on the Edit Inbound SIP Trunk form](../../../../_images/edit_screen.png)](../../../../_images/edit_screen.png)


**Fig. 4.** Update and save the SIP trunk settings

## Enable CNAM lookup

1. Open the SIP trunk for editing. See [Edit a SIP trunk](#user-panel-sipin-trunk-edit).
2. Select **Additional Services**.
3. Turn on **Enable CNAM Lookup**.
4. Click **Submit**.

An additional charge applies to each call from a U.S. source number. If the
trunk belongs to a Trunk Group, review [Trunk Group
behavior](../call-information/cnam-in.html#inbound-sip-cnam-in-trunk-groups) before enabling the setting. See
[CNAM IN for SIP trunks](../call-information/cnam-in.html) for how caller
names are delivered and where CNAM IN charges appear in call logs.

[![Additional Services tab with Enable CNAM Lookup turned on and the per-call charge displayed](../../../../_images/enable-cnam-lookup1.webp)](../../../../_images/enable-cnam-lookup1.webp)


**Fig. 5.** Enable CNAM lookup

## Delete SIP trunks

Delete one SIP trunk from its **Actions** menu or delete multiple SIP trunks
using **Batch Actions**.

Warning

Deleting a trunk is permanent and cannot be undone. Confirm that the trunk
is no longer required before continuing.

A trunk that is assigned to a DID number or otherwise in use cannot be
deleted. First [unassign the trunk from every DID
number](../../../../phone-numbers/my-numbers/how-to-guides/assign-voice-trunk.html#user-panel-assign-trunk-single) and
remove any other configuration that
uses it.

### Delete one SIP trunk

1. Go to **Voice > Inbound Trunks**.
2. Locate the SIP trunk and open its **Actions** menu.
3. Click **Delete**.

[![Actions menu for an inbound SIP trunk with Delete available](../../../../_images/actions_delete4.png)](../../../../_images/actions_delete4.png)


**Fig. 6.** Delete one SIP trunk

4. In the **Delete Trunk(s)** confirmation window, review the selected trunk
   and click **Delete**.

[![Delete Trunk confirmation window for one inbound SIP trunk](../../../../_images/delete_one.png)](../../../../_images/delete_one.png)


**Fig. 7.** Confirm the deletion

### Delete multiple SIP trunks

1. Go to **Voice > Inbound Trunks**.
2. Select the SIP trunks to delete.
3. Click **Batch Actions > Delete Trunk(s)**.

[![Batch Actions menu with Delete Trunk(s) available for selected SIP trunks](../../../../_images/delete_batch_actions3.png)](../../../../_images/delete_batch_actions3.png)


**Fig. 8.** Delete multiple SIP trunks

4. In the **Delete Trunk(s)** confirmation window, review the selected trunks
   and click **Delete**.

[![Delete Trunk confirmation window listing multiple inbound SIP trunks](../../../../_images/delete_batch.png)](../../../../_images/delete_batch.png)


**Fig. 9.** Confirm the batch deletion

## Related resources

- [Create a SIP trunk](create-sip-trunk.html) - Create and initially
  configure an inbound SIP trunk.
- [SIP trunk settings reference](../sip-trunk-settings-reference.html) -
  Look up field definitions, defaults, dependencies, available values, and
  limits.
- [Assign a voice trunk](../../../../phone-numbers/my-numbers/how-to-guides/assign-voice-trunk.html#user-panel-assign-trunk) - Assign or unassign
  an inbound trunk or Trunk Group for one or more DID numbers.
- [View SIP registration credentials](view-sip-registration-credentials.html) - Configure a SIP endpoint to register
  a Dynamic Registration trunk with DIDWW.
- [View registration history](view-registration-history.html) - Review the
  successful registration intervals of a Dynamic Registration trunk.

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