---
title: Switching a 2B Into Commander Mode
description: Switch an E-Stim Systems 2B into Commander mode for E-Stim Connect, Commander and UpLink. Not needed on firmware 2.106 and later.
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In order to use the Digital Link Interface with Commander3, UpLink or E-Stim Connect you need to switch Commander on on the 2B. If you are running the latest firmware 2.106, then this process is NOT required, as your 2B will automatically switch into Commander Mode when required.

These are the steps for 2B firmware 2.105 or older.

## Step 1.

Switch your E-Stim Systems 2B on. once the 2B has gone through its self-check process you should see a screen similar to this;

![commander off](https://e-stim.online/images/2b/switch-commander-on/commander-off.jpg)

## Step 2.

Double Press Select in order to get into the mode select display.

![mode select](https://e-stim.online/images/2b/switch-commander-on/mode-select.jpg)

## Step 3.

Rotate the adjust knob so the display shows

![mode commander](https://e-stim.online/images/2b/switch-commander-on/mode-commander.jpg)

22 Commander. The bottom line will be moving.

## Step 4

Press Select, you should now see the select option display

![select commander off](https://e-stim.online/images/2b/switch-commander-on/select-commander-off.jpg)

## Step 5

Now rotate the adjust knob to show Commander:On

![select commander on](https://e-stim.online/images/2b/switch-commander-on/select-commander-on.jpg)

## Step 6

Now press Select. At this point Commander is not yet switched on. You should now see an arrow on the bottom line of the display on the 2B.

![commander on](https://e-stim.online/images/2b/switch-commander-on/commander-on.jpg)

This indicates Commander on the 2B is now active. Now you can plug in the Digital link interface cable.

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