A button set to this function allows the user to switch call coverage for their extension on or off. The button settings include the extension number of the extension providing coverage. When on, calls to the user that ring unanswered for the user's number of coverage rings then also start ringing at the call coverage extensions.

When on, a call to the extension that ring unanswered for the extension's Call Coverage Rings setting will also start alerting on the covering extension specified by the button.

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.

This function does not require a button that includes lights. However, if set on a button with lights, the green LED will match whether the function is on or off.

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

Programming the destination and/or the originator onto the call coverage button is optional.

To access this function without a programmable button:

On DS and ETR phones, press FEATURE and then dial 20.

On BST phones, press FEATURE and dial 932.