High performance computing and grid computing processing for seismic and reservoir simulation are performed without impacting or losing processing time in case of failures. The via allows for the passage of a signal from one signal plane to another in the, and in so doing transgresses the power and ground planes between the signal plane. The locking part is fixed to the housing structure and a sliding part including a resisting portion passing through the latching hole and the locking hole to engage with the communication apparatus.