A button set to this function allows the user to swap the display of caller ID name and number information on their extension.

On some phones, after the call is answered the call display is not able to show both the caller ID name and number. This function allows the user on such phones to toggle between the name and the number.

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

This function is only supported on a button that includes LED/LCD indicator. The indicator is lit when the function is enabled.

If the user has this feature enabled, removing this button will turn the feature off.

To access this function without a programmable button:

On DS and ETR phones, press FEATURE and dial 16.

On BST phones, press FEATURE and dial 933.