Abstract: A video data providing unit (10) connects to a restricted access providing-side VPN (20). A streaming server (60) connects to a restricted access transmitting-side VPN (50). A router (40) determines whether or not transmitting-side data such as request data or instruction data received via the transmitting-side VPN (50) is data that has been transmitted from the streaming server (60), and whether or not providing-side data such as video data received via the providing-side VPN (20) is data that has been transmitted from the information providing unit (10). The router 40 then transfers the transmitting-side data and providing-side data based on those determination results.

Abstract: A video data providing unit (10) connects to a restricted access providing-side VPN (20). A streaming server (60) connects to a restricted access transmitting-side VPN (50). A router (40) determines whether or not transmitting-side data such as request data or instruction data received via the transmitting-side VPN (50) is data that has been transmitted from the streaming server (60), and whether or not providing-side data such as video data received via the providing-side VPN (20) is data that has been transmitted from the information providing unit (10). The router 40 then transfers the transmitting-side data and providing-side data based on those determination results.

Abstract: The objective is to offer increased flexibility in allocation of telephone numbers and achieve liberation from the restrictions on the total number of dial-in numbers. When at a server a receiver receives request information from a cellular phone as a requester (S01), a subaddress recognizer recognizes a subaddress included in the received request information (S02) and an address converter converts the recognized subaddress to an IP address on the basis of predetermined conversion correspondence information (S03). Then a data retriever retrieves content data correlated with the IP address obtained by the conversion, from a service DB (S04) and a data output part outputs the content data to the requester cellular phone (S05).