Patent ID: 7225351

Claim:
A gateway card that is connected to an information processor and that receives and transmits data between different networks, the information processor having a normal power mode and a power saving mode, the gateway card comprising: a switching unit that connects the memory with either the information processor or the gateway card; a switch control unit that controls the switching unit to connect the gateway card to the information processor when the information processor is in the normal power mode enabling the information processor to read or write data via the networks, and controls the switching unit to connect the memory to the gateway card when the normal power mode of the information processor is changed to the power saving mode, and an access control unit that controls an access to the memory to allocate the access to the memory via the switching unit when the information processor is in the power saving mode, and allocate the access to the memory via the information processor and the switching unit when the power saving mode is returned to the normal power mode.