A contact switch structure has a touch piece, a movable contact disposed on the touch piece, a fixed contact disposed opposite the movable contact, and a guide unit that is provided in a side region with respect to an operating range of the movable touch piece to control an air flow. The surfing guide provides multiple channel regions, where each channel region is associated with a different channel that is available to the viewer. Workers are supported above the accumulated liquids by the support medium. In preferred embodiments, a TDM bus and a packet bus are intelligently bridged and managed, thereby enabling such multiple modeprotocol voice and data transmissions to be intelligently managed and controlled with a single, integrated system.