| 摘要 |
<p>A virtual device driver is installed in a client terminal and a server as software, and also a virtual hub is installed in a server as software. For example, by giving an L2-VPN function to the SIP terminal node itself, and installing the above-mentioned software in the existing server node,
it is not necessary to install a special server node, and even when between the clients terminals which communicate use what kind of network environment and a protocol, peer-to-peer communication is enabled general-purpose.</p> |
