T4X no beep on intercom answer

[JohnJ]

// SECURITY OPTION 1
// BEEP AN AUDIO ALERT WHEN AN INTERCOM STARTS
features.intercom.tone="1"

// SECURITY OPTION 2
// MUTE YOUR MIC – WHEN AN INTERCOM STARTS
features.intercom.mute="1"

// INTERCOM CONVERSATIONS RING YOUR PHONE TO ANSWER INSTEAD.
// LIFTING THE HANDSET(0) VS HANDSFREE CONVERSATION (1).
features.intercom.allow="1"

// BLOCK INTERCOM CALLS DURING ACTIVE CALLS
// It enables or disables the phone to answer an incoming intercom call while there is already an active call on the IP phone.
features.intercom.barge="0"