# Export and Import Trunk Outbound Caller IDs

Cloud Voice lets you move a trunk's outbound caller ID list in and out of the PBX (Private Branch Exchange, your phone system) as a CSV (Comma-Separated Values, a plain-text spreadsheet) file. Exporting gives you a ready-made template you can edit offline, and importing writes those entries back to the trunk in a single step. This is the fastest way to add, update, or remove many caller IDs at once instead of editing them one by one in the web portal.

:::note
An outbound caller ID is the number shown to the person you call when a call leaves over this trunk. Each trunk keeps its own list on its **Outbound Caller ID** tab, so export and import always apply to the one trunk you have open.
:::

## Export the outbound caller ID list

Save every entry on a trunk to a CSV file so you can review it, keep a backup, or use it as a starting template for edits.

1. Sign in to the PBX web portal and go to **Extension and Trunk > Trunk**, then open the trunk you want to work with.
2. Select the **Outbound Caller ID** tab.
3. Under **Outbound Caller ID List**, click **Export**.

Cloud Voice downloads a CSV file to your computer. For a breakdown of each column and the values it accepts, see [Trunk Outbound Caller ID Parameters](/pbx/administrator-guide/import-and-export-parameters-trunk-outbound-caller-id/).

## Import an outbound caller ID list

:::tip
Export the current list first and edit that file. Starting from an exported template keeps the columns and format correct, which saves you time and avoids import errors.
:::

Before you import, make sure your file meets these requirements:

- **Format**: UTF-8 encoded CSV
- **Size**: under 5 MB
- **File name**: fewer than 127 characters
- **Contents**: every value follows the rules described in [Trunk Outbound Caller ID Parameters](/pbx/administrator-guide/import-and-export-parameters-trunk-outbound-caller-id/)

:::caution
If the file misses any of these requirements (wrong encoding, over 5 MB, an over-long name, or a value that breaks a parameter rule), the import fails. Save the file as UTF-8 CSV and check it against the list above before you upload.
:::

To import the file:

1. Sign in to the PBX web portal and go to **Extension and Trunk > Trunk**, then open the trunk you want to update.
2. Under **Outbound Caller ID List**, click **Import**.
3. In the window that appears, click **Browse** and choose your CSV file.
4. Click **Import**.

The caller IDs from the file now appear in the trunk's **Outbound Caller ID List**. Review the list afterward to confirm the entries match what you intended, since these numbers are what the called party sees on outbound calls.