Abstract: A method and apparatus for controlling an electronic display comprises a guest controller transparently linked to an existing host computer system or network. The host computer network is typically a serial network of point-of-sale (POS) electronic cash registers wherein one register functions as the network server. Nevertheless, the various preferred embodiments of the present invention are readily adapted for use with a variety of host computer systems. The guest controller “listens” to information transferred in the host computer system or network and produces output to the electronic display according to predetermined preferences and formats. The guest controller and the electronic display system are manipulated and programmed using existing host input devices, such as a register keypad, without any obvious effect upon the existing computer system or network.

Abstract: An apparatus for protecting equipment in an outdoor communication structure from adverse weather conditions, vibration, and vandalism includes a housing that possesses hidden lip door edges and is assembled such that no screws, nuts, hinges, etc. are left exposed. Also, any speakers and/or microphones are largely isolated from potential vibration by surrounding them with vibration dampeners such as foam or other padding or insulation. Heat, dust intake, vibration, and electricity usage are reduced by providing convection venting wherein the internal cavity of the housing narrows at a top region of the housing. Vents in the top region of the housing allow air from the narrowed internal cavity to escape as it heats and expands. As hot air is displaced from the narrowed internal cavity, cooler ambient air is drawn into the internal cavity through bottom vents in a bottom region of the housing.