A process for the preparation of a porous composite product. After transmission of a first portion of the data packet, the transmission is temporarily suspended, a flow-control message is sent from the first port to the second port over the communication link while the transmission is temporarily suspended, and then the transmission is resumed so as to transmit a second portion of the data packet. Second order data is generated based upon the first order data and the additional information. A light-transmitting top panel and top shelf can be used to provide improved light within the cabinet. The memory controller then provides a response that is sent to the processor. The DP and DI packets are sent via a permissive interrupt mechanism, received by each processor unit making up a node and forwarded to the monitor process of the node.