The object is to realize reasonable power-saving operation in a NIC portion depending on a link status for the Ethernet in a system device including a NIC. One of the plurality of control packets is first outputted and its corresponding respective data burst is then outputted at a time corresponding to the generation of the first of the plurality of tokens which occurs at a time in which no data burst is being outputted, the outputting of the data burst being offset from the output of its corresponding respective control packet by a time period. In another embodiment, the acoustic decoupler comprises a Bragg stack. The main vertical bars can have thread-like deformations along the length of the bar, and are locked in place by use of compatible hardware against the templates. Thus, the heat sink is secured between the socket and the retaining clip. These foams are suitable for producing automotive interior trim, more particularly roof linings and pillar trim.