A button set to this function allows the user to switch use of voicemail coverage for their extension on or off.

When on, calls to the extension are redirected to the extension's mailbox when they ring unanswered for the extension's VMS Coverage Rings setting. When off, calls to the extension continue to ring at the extension until answered or the caller hangs up.

If the feature is programmed onto a button with LEDs/LCD, it will indicate when the feature is active.

If an extension already has a button set to this function, creating another button with this function automatically clears the setting from the existing button.

To access this function without a programmable button:

On DS and ETR phones, press FEATURE and then dial 15.

On BST phones, press FEATURE and dial 984.