一、小型企业通过ISDN上网1.组网需求 利用现有的ISDN实现小型企业接入Internet,同时实现企业网的远程互联。2.组网示范 方案见图1所示。企业网1使用ISDN接入Internet,通过DDN和企业网2互联,因此,企业网2不需要再直接连接Internet。华为Quidway R1603/1604路由器的网络地址翻译(NAT)功能,可以使2个局域网互联时,使用各自IP地址上网。 First, the small business through the ISDN Internet 1. Network Requirements The use of existing ISDN small businesses access the Internet, while achieving long-distance corporate Internet interconnection. 2. Network demonstration program shown in Figure 1. The enterprise network 1 uses ISDN to access the Internet and connects to the enterprise network 2 through the DDN. Therefore, the intranet 2 does not need to directly connect to the Internet. Huawei Quidway R1603 / 1604 router network address translation (NAT) function, you can make two LAN interconnection, the use of their respective IP addresses online.