Method, apparatus, and computer program product example embodiments use native clock timing of a first wireless communications protocol to establish synchronization of a wireless network of a second wireless communications protocol. In some cases, different version service nodes in a service grid can communicate using an inter-operability service to, for example, convert messages from one format associated with a version of a service node to another format associated with another version of a service node. The adjusting plate having a thickness corresponding to a folding angle of the door mirror is attached to each or one of both the opposite side surfaces of the projection. A second face panel extends from the projection panel in front of the doorway when the projection panel is mounted to the wall, where the second face panel having a second distal edge spaced apart from the projection panel.