This can only be triggered via auto-provisioning: Create an XML file like the example below. Or click here to download.
<?xml version= "1.0" encoding= "UTF-8" ?>
<provisioning version= "1.1" productID= "e2" >
<nvm>
<param name= "DmGlobal.0.SupportSipRingtones" value= "0" />
</nvm>
</provisioning>
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In the web-interface go to: SETTINGS - System - provisioning and configuration - Auto configuration file - Browse, select your file, upload and press Start auto configuration.
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