# Export and Import SIP Trunks

A SIP (Session Initiation Protocol) trunk is the connection that carries calls between your phone system and the outside telephone network. Cloud Voice lets you download your existing trunks to a CSV (comma-separated values) file and load trunks back into the system from a CSV file. Exporting first gives you a ready-made template you can edit, duplicate, or use as the basis for a bulk import. This page walks through both directions.

## What you can import

Bulk import supports Peer Trunks and Register Trunks only. Other trunk types cannot be added this way.

## Export every SIP trunk

Exporting produces a single CSV file that lists all of your current trunks. Once you have it, you can add, remove, or adjust entries directly in the file.

1. Sign in to the Cloud Voice web portal and open **Extension and Trunk > Trunk**.
2. Select **Export**.

   The CSV file downloads to your computer. For a breakdown of every column and the values each field accepts, see [Trunk Parameters](/pbx/administrator-guide/import-and-export-parameters-trunk/).

## Import SIP trunks

:::tip
The quickest way to build an import file is to export your trunks first, then edit the resulting CSV. Starting from that template keeps the column headers and formatting correct, so you avoid building one from scratch and save time.
:::

### Before you begin

- Confirm that your account can import trunks.

  :::note
  If the **Import** button under **Extension and Trunk > Trunk** is greyed out, your account does not have import permission. Contact your service provider to have it enabled.
  :::

- Make sure your file meets these requirements:
  - **Format**: UTF-8 CSV
  - **Size**: under 50 MB
  - **File name**: fewer than 127 characters
  - **Field values**: every value must be valid. See [Trunk Parameters](/pbx/administrator-guide/import-and-export-parameters-trunk/) for the accepted format of each field.

  :::caution
  An import that breaks any of these limits (over 50 MB, a file name of 127 characters or more, or a file that is not UTF-8 CSV) will be rejected. Check the file against the list above before you upload.
  :::

### Steps

1. Sign in to the Cloud Voice web portal and open **Extension and Trunk > Trunk**.
2. Select **Import**.
3. In the dialog that opens, select **Browse** and choose your CSV file.
4. Select **Import**.

   The trunks defined in the file appear in the **Trunk** list.