Abstract: A power supply apparatus includes an uninterruptible power supply (UPS) having an input configured to be coupled to a first power source and an output configured to be coupled to a load and a first static switch configured to provide a switchable bypass path from the first power source to the load. The apparatus further includes a second static switch controllable to provide a switchable path between the load and a second power source, and a controller circuit configured to cooperatively control the first and second static switches to transfer the load to the second power source. The controller circuit may be operative to transition the load from a first state wherein the load receives power from the first power source via the first static switch to a second state wherein the load receives power from the second power source while isolated from the first power source.

Abstract: Methods, systems and computer program products for conducting a virtual product presentation are provided. Voice communications are established between a sales representative at a first computer and a customer at a remote second computer coupled to the first computer. Respective first and second displays of a three-dimensional product presentation space are generated at respective ones of the first and second computers. Navigation of the three-dimensional product presentation space at the second computer is controlled from the first computer while maintaining the voice communications between the sales representative and the customer. Generation of the respective first and second displays of a three-dimensional product presentation space may occur responsive to authorization of access to the three-dimensional product presentation space from the second computer, e.g.