Feature codes are three-digit extensions that users can dial to enable or disable certain features for themselves. Feature codes are typically prefixed with an asterisk (*) sign followed by two numbers. The feature codes on a FreePBX system can be altered to use a different extension or disabled.
To customize feature codes, click on the Feature Codes link under the Basic menu on the left as shown in the following screenshot:
All the available features codes will be displayed as shown in the following screenshot:
To change the extension that a feature code uses, uncheck the Use Default? option and type in the new extension that should be used as shown in the following screenshot:
To disable a feature code entirely, change the drop-down value from Enabled to Disabled as shown in the following screenshot:
Once the customizations are complete, scroll down to the bottom and click on the Submit Changes button to save them.