Abstract: A system receives a vehicle transport instruction for transporting a vehicle. The system instructs display of an indicator related to the transport instruction, using a first vehicle output. Further, the system determines whether a vehicle is in a state designated for alert notification based on at least a transportation error detected by the vehicle and changes at least one of the first vehicle output or a second vehicle output to indicate the transportation error responsive to detection of the transportation error by the vehicle.

Abstract: In an ATM communications system, a cell entering a switch fabric input port is routed to its destination output port and to a predetermined dedicated second output port. The second output port is connected by a feedback connection to a predetermined dedicated second input port. The cell can then be either switched to the same destination output port or switched to both the same destination output port and the predetermined dedicated second output port, thereby providing the ability to execute a logical multicast with any number of leaves to the destination output port.