# Manage SMPP ESME trunks

Manage existing SMPP ESME trunks from the **SMS Trunks** page. Edit a trunk's
settings, move it to another Server location, 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 SMPP ESME trunk is required. If you do not have one, see
  [Create an SMPP ESME trunk](create-smpp-esme-trunk.html).

## Edit an SMPP ESME trunk

1. In the DIDWW User Panel, go to **SMS > SMS Trunks**.
2. Locate the trunk you want to edit and click the **Actions** button next to
   it.
3. Select **Edit**.

[![Actions menu of an SMPP ESME trunk on the SMS Trunks page with Edit highlighted](../../../../_images/fig_actions_edit.png)](../../../../_images/fig_actions_edit.png)


**Fig. 1.** Open the SMPP ESME trunk edit form

4. On the **Edit SMPP ESME Trunk** page, modify the settings as needed. The
   sections match those on the creation form. See [Configure the General
   settings](create-smpp-esme-trunk.html#smpp-esme-create-general), [Configure the source
addresses](create-smpp-esme-trunk.html#smpp-esme-create-source-address), and [Add the trunk to a trunk
group](create-smpp-esme-trunk.html#smpp-esme-create-trunk-group).
5. Click **Submit** to apply your changes.

For definitions, defaults, and constraints of all settings, see [SMPP ESME
trunk settings reference](../smpp-esme-trunk-settings-reference.html).

[![Edit SMPP ESME Trunk page with the General and Source Address Settings sections and the Submit button highlighted](../../../../_images/fig_edit_window2.webp)](../../../../_images/fig_edit_window2.webp)


**Fig. 2.** Update and save the SMPP ESME trunk settings

### Move a trunk to another Server location

To move the trunk to another DIDWW SMPP server location, change its **Server
location**.

Important

Before you save a new **Server location**, make sure your firewall allows
your application to open connections to the IP address of the new
location. See [Server locations and IP addresses](../../technical-data/smpp-specification.html#smpp-endpoints).

1. In the DIDWW User Panel, go to **SMS > SMS Trunks**.
2. Locate the trunk, click the **Actions** button next to it, and select
   **Edit**.
3. Select a different **Server location**.
4. Click **Submit**.

The trunk's credentials then show the host for the new location. Update your
application to bind to that host. See [View SMPP ESME trunk credentials](view-smpp-esme-trunk-credentials.html).

## Delete SMPP ESME trunks

Delete one SMPP ESME trunk from its **Actions** menu, or delete multiple trunks
using **Batch Actions**.

Warning

Deleting a trunk is permanent and cannot be undone. A trunk that is
assigned to any DID number cannot be deleted until it is unassigned. See
[Assign an SMS trunk](../../../../phone-numbers/my-numbers/how-to-guides/assign-sms-trunk.html#assigning-sms-trunk).

Delete one trunk

1. In the DIDWW User Panel, go to **SMS > SMS Trunks**.
2. Locate the trunk you want to remove and click the **Actions** button
   next to it.
3. Select **Delete**.

[![Actions menu of an SMPP ESME trunk on the SMS Trunks page with Delete highlighted](../../../../_images/fig913.png)](../../../../_images/fig913.png)


**Fig. 3.** Delete one SMPP ESME trunk

4. In the **Delete SMS Trunk(s)** confirmation window, review the trunk
   and click **Delete** to permanently remove it.

[![Delete SMS Trunk(s) confirmation window for one SMPP ESME trunk](../../../../_images/fig_delete_confirm2.webp)](../../../../_images/fig_delete_confirm2.webp)


**Fig. 4.** Confirm the deletion


Delete multiple trunks

1. In the DIDWW User Panel, go to **SMS > SMS Trunks**.
2. Select the trunks you want to delete by checking the boxes next to
   them.
3. At the bottom of the page, click **Batch Actions > Delete SMS
   Trunk(s)**.

[![Two SMPP ESME trunks selected on the SMS Trunks page with Delete SMS Trunk(s) shown in the Batch Actions menu](../../../../_images/fig108.png)](../../../../_images/fig108.png)


**Fig. 5.** Delete multiple SMPP ESME trunks

4. In the **Delete SMS Trunk(s)** confirmation window, review the
   selected trunks and click **Delete** to permanently remove them.

[![Delete SMS Trunk(s) confirmation window listing two SMPP ESME trunks](../../../../_images/fig_delete_batch_confirm2.webp)](../../../../_images/fig_delete_batch_confirm2.webp)


**Fig. 6.** Confirm the batch deletion

## Related resources

- [Create an SMPP ESME trunk](create-smpp-esme-trunk.html) - Create and
  initially configure an SMPP ESME trunk.
- [SMPP ESME trunk settings reference](../smpp-esme-trunk-settings-reference.html) - Look up field definitions,
  defaults, and constraints.
- [Assign an SMS trunk](../../../../phone-numbers/my-numbers/how-to-guides/assign-sms-trunk.html#assigning-sms-trunk) - Assign or unassign an
  SMS trunk for one or more DID numbers.
- [Server locations and IP addresses](../../technical-data/smpp-specification.html#smpp-endpoints) - Look up the
  hostname and IP address of each DIDWW SMPP server location.
- [SMS trunk groups](../../trunk-groups/sms-trunk-groups.html) -
  Combine SMS trunks for failover.