| 摘要 |
Even when a site of the Internet is used, switching is automatically performed to a connection via NGN, and a service via the NGN is provided to a user terminal. A HGW transmits a request from the user terminal in accordance with a destination address to a redirect server and a service provider server through one of an IP network and an NGN network. The redirect server redirects access to the service provider server via the IP network to access via the NGN network. The user terminal accesses one of communication devices of the service provider server through the IP network, and communication with the service provider server is performed through the NGN network based on address information of a redirect destination from the redirect server.
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