National and regional online systems usually have local telephone numbers that PC modems can call to access either a local information base or an indirect long-distance connection, thus reducing long-distance telephone fees. Some online systems allow users to copy large volumes of information onto a local memory storage device, which also reduces the time the user is connected to the online system.


国家或者是地区级的在线系统通常有本地的电话号码,PC路由器能够通过拨号进入本地信息库或者间接长途连接,因此减少了长途电话费用.有些在线系统允许用户拷贝大容量的信息到本地存储装置,这也减少了用户连接在线系统的时间.