# Deltacast FLEX Management

By default, LightAct's reActor servers use Deltacast's FLEX technology, which provides video capture and playout capabilities. The FLEX solution ensures high-quality video processing with low-latency performance, resulting in a reliable and robust user experience.

## Deltacast Gateway Card

The reActor servers are equipped with a PCI Express gateway card which enables connectivity to video I/O modules via its ports.

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**Good to know:** You should be able to see the Deltacast gateway card in the Device Manager, by expanding the Deltacast section, under the name *DELTA-gwy*.
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<div align="left"><figure><img src="https://3312042618-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9sVaJpWJhPbmscipukhh%2Fuploads%2Fgit-blob-c6217f0ec6bd3e0878ea31d53754b3fbc9a32ae8%2FDeviceManageer.png?alt=media" alt=""><figcaption></figcaption></figure></div>

## FLEX Modules

A FLEX module is an independent device, responsible for managing one or multiple video channels. A single FLEX module can connect to a single port of the Deltacast gateway card using a FLEX cable.

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**Good to know**: As of right now, Deltacast offers solutions for DisplayPort, HDMI and SDI. All of these options are available for video input and output in LightAct.
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## Deltacast Board

In LightAct, a Deltacast module is called a *Deltacast board*. LightAct will detect a Deltacast *board* once you have connected at least one FLEX module to a Deltacast gateway card port.

![](https://3312042618-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9sVaJpWJhPbmscipukhh%2Fuploads%2Fgit-blob-09f95513000a6acc382894c7a4fa6bf2cd02e7da%2FBoardDetectedInLA1.png?alt=media) ![](https://3312042618-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9sVaJpWJhPbmscipukhh%2Fuploads%2Fgit-blob-38369457de106a629f8ea1ec714dfdb6d00c8801%2FBoardDetectedInLA2.png?alt=media)

{% hint style="danger" %}
The reActor servers must be off when you add, remove or replace FLEX modules. In the opposite case, you are likely to experience malperformances.
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