Asynchronous port, dail mode and DDR configuration are described in detailed. The routing configuration of the floating static routing and dail backup are explained.

• 文中对异步端口、拨号方式和按需拨号路由的配置进行详细说明 ,并给出了浮动静态路由、拨号后备两种按需拨号路由配置方案。