Described are compounds having formula I or II: . The handle includes first and second coupling mechanisms that control the connection between the handle and the operator depending on whether the door is open or closed. A master controller has at least first and second controllers. The method further includes determining whether an importance level has been designated for the particular call, setting a value of the notification value field based on whether an importance level has been designated for the particular call, and transmitting the initial address message for the particular call to a recipient mobile device.