Abstract: A communication system, network, interface, and port architecture are provided for transporting data across a network. The network can be arranged by connecting the ports in a daisy chain fashion to achieve a ring architecture or topology. The network forwards data according to a specific network protocol. A first port forwards frames having a preemptive acknowledge field before the payload. A second port receives these frames, stores them in a frame buffer and modifies the preemptive acknowledge field according to its available frame buffer capacity. Said first port controls its data flow according to the modified preemptive acknowledge field.

Abstract: A communication system, network, interface, and port architecture are provided for transporting data across a network. The network can be arranged by connecting the ports in a daisy chain fashion to achieve a ring architecture or topology. The network forwards data according to a specific network protocol. A first port forwards frames having a preemptive acknowledge field before the payload. A second port receives these frames, stores them in a frame buffer and modifies the preemptive acknowledge field according to its available frame buffer capacity. Said first port controls its data flow according to the modified preemptive acknowledge field.

Abstract: A facility for presenting a visual user interface for guiding the performance of a process relating to a patient localization and tracking system is described. The facility displays the user interface in a first state that corresponds to a first process task in an ordered sequence of process tasks. Each time the process task to which the displayed state of the user interface corresponds is completed, the facility redisplays the user interface in a state corresponding to a process task following the process task to which the displayed state of the user interface corresponds.