# What is Remote Scan ？

Remote Scan solution is officially available starting in [Dynamic Web TWAIN](https://www.dynamsoft.com/web-twain/overview) v18.2. It allows end users to access scanners of various protocols (TWAIN, SANE, ICA, eSCL, WIA) on the Intranet through any devices and any popular browsers, without any extra software installed.

**Benefits:**  

* One PC is connected to the scanner and all the other devices can use the scanner.
* Users can scan on any devices like PCs, mobile phones and tablets.
* [Dynamic Web TWAIN Service](https://www.dynamsoft.com/glossary/index.md#:~:text=Dynamic%20Web%20TWAIN%20Service){:target="_blank"} is not required to be installed on every end user device. (At least one needs to be installed to communicate with scanners)

**Architecture:**

![remote scan architecture](https://www.dynamsoft.com/assets/imgs/remote-scan-architecture.svg)

The end-user device can either connect to a [service](https://www.dynamsoft.com/glossary/index.md#:~:text=Dynamic%20Web%20TWAIN%20Service){:target="_blank"} or a [proxy server](https://www.dynamsoft.com/glossary/index.md#:~:text=Proxy%20Server){:target="_blank"} to scan documents:

* Connect to a service: the [RESTful API](https://www.dynamsoft.com/web-twain/docs/extended-usage/restful-api.md) added in Dynamic Web TWAIN v19.0 enables document scanning using other programming languages by direct communication with the Dynamic Web TWAIN Service.
* Connect to a proxy server: we can use proxy server to manage multiple Dynamic Web TWAIN Services. It has wrapped JavaScript functions and is easier to use.

In this documentation, we'll use the proxy server approach.

## Requirements

* Dynamic Web TWAIN.
* A valid [license](https://www.dynamsoft.com/customer/license/trialLicense?product=dwt) with the Remote Scan feature enabled.
   
## Introduction Video

<iframe style="max-width:100%;" width="900" height="500" src="https://www.youtube.com/embed/T9dx2Z_kyoY" title="Remote Document Scanning | Dynamic Web TWAIN" frameborder="0" allow="accelerometer; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen=""></iframe>