# Import and Export Parameters Overview

Cloud Voice lets you manage many configuration items at once by working with CSV files instead of editing records one at a time. This overview explains how the CSV workflow fits together and points you to the field-level reference for each module that supports it.

## Why CSV files help

A CSV (comma-separated values) file is a plain text file that holds tabular data, the same format that spreadsheet applications such as Excel read and write. Because each row represents one record and each column a setting, a CSV is an efficient way to describe a large batch of configuration in a single file.

The typical workflow has three steps:

1. Export the current data from Cloud Voice as a CSV file.
2. Open the file, then add, edit, or remove rows to describe the changes you want.
3. Import the file back into Cloud Voice to apply every change in one operation.

:::tip
Export the module first, even if it currently holds no records. The exported file gives you the exact column headers and layout the importer expects, so you can fill in your rows against a known-good template instead of guessing the format.
:::

This lets you make sweeping changes quickly. Creating a large group of extensions, for example, is far faster from a prepared CSV than adding each extension by hand.

:::caution
An import applies to every row in the file at once. A formatting mistake or a wrong value can therefore change many records in a single step. Review the file carefully and keep the original export as a backup before you import.
:::

## Modules that support import and export

The following modules can export their data to CSV and accept CSV imports. Select a module to see its full field reference, including which columns are required, which are optional, and the values each column accepts.

Several entries deal with DID/DDI numbers. DID (Direct Inward Dialing), also called DDI (Direct Dialling In) in Europe, refers to the external phone numbers that route inbound calls to your system.

- [Extension Parameters](/pbx/administrator-guide/import-and-export-parameters-extension/)
- [Organization Parameters](/pbx/administrator-guide/import-and-export-parameters-organization/)
- [Contacts Parameters](/pbx/administrator-guide/import-and-export-parameters-contacts/)
- [Holidays Parameters](/pbx/administrator-guide/import-and-export-parameters-holidays/)
- [Speed Dial Number Parameters](/pbx/administrator-guide/import-and-export-parameters-speed-dial-numbers/)
- [Emergency Number Parameters](/pbx/administrator-guide/import-and-export-parameters-emergency-numbers/)
- [Auto Provisioning Phone Information Parameters](/pbx/administrator-guide/import-and-export-parameters-auto-provisioning-phone-information-parameters/)
- [Trunk Parameters](/pbx/administrator-guide/import-and-export-parameters-trunk/)
- [Trunk DIDs/DDIs Parameters](/pbx/administrator-guide/import-and-export-parameters-trunk-dids-ddis-numbers/)
- [Trunk Outbound Caller ID Parameters](/pbx/administrator-guide/import-and-export-parameters-trunk-outbound-caller-id/)
- [Inbound Caller ID Reformatting Rule Parameters](/pbx/administrator-guide/import-and-export-parameters-inbound-caller-id-reformatting-rule/)
- [Inbound Route Parameters](/pbx/administrator-guide/import-and-export-parameters-inbound-route/)
- [DID Number to Specific Extension Parameters](/pbx/administrator-guide/import-and-export-parameters-did-number-to-specific-extension/)
- [Outbound Route Parameters](/pbx/administrator-guide/import-and-export-parameters-outbound-route/)
- [Outbound Call Frequency Restriction Rule Parameters](/pbx/administrator-guide/import-and-export-parameters-outbound-call-frequency-restriction-rule/)
- [Rate Parameters](/pbx/administrator-guide/import-and-export-parameters-rate/)
- [Allowed Numbers Parameters](/pbx/administrator-guide/import-and-export-parameters-allowed-numbers/)
- [Blocked Numbers Parameters](/pbx/administrator-guide/import-and-export-parameters-blocked-numbers/)
- [Message Campaign Parameters](/pbx/administrator-guide/import-parameters-message-campaign/)

:::note
The exact set of supported parameters can vary with your system's firmware version, so the columns you see in an exported file may differ slightly from the reference pages.
:::