Abstract: A sign comprises a base layer and a transparent or translucent upper sheet over the base layer. An icon or indicia of the sign is associated with the base layer or is printed on the upper sheet. The upper sheet and base layer are releasably adhered together under pressure applied on the upper sheet which causes the icon or indicia to be displayed. When the upper sheet is released from the base layer the icon or indicia is erased. In another embodiment the icon or indicia is displayed when the upper sheet is released from the base layer, and is erased when the upper sheet is pressed to adhere to the base layer.

Abstract: A system and method for routing data between input and output ports in an ATM node of a packet-switched network allocates port capacity in accordance with the requirements of the users connected to the ports. Capacity may be allocated either dynamically in real time, according to a fixed predetermined schedule, or according to certain characteristics of the data awaiting transfer between users, such as the length or type of data. The system and method optimize the utilization of system resources by enabling ports having a physical capacity which substantially exceeds the capacity of a conventional ATM switch to be interconnected for data transfer.