推荐回答（6个）
这得看你家上网的种类是哪种了
1.如果是ADSL上网,就必须有一个ADSL调制解调器,这东西一般装网时你的服务商会给你的,已经算在初装费中了.你所说的调制解调器是拨号上网用的,不是插网卡的,网卡接口是RJ45的口.ADSL上网是通过电话线上网的,电话线插入信号分离器(一个小盒子,使你可以同时上网和打电话,不干扰,如果没有,上网时打电话,你的电脑会掉线的),然后分离器的另一端分别接电话和ADSL调制解调器,再通过调制解调器引出RJ45的口(即比电话线接口稍宽一点的接口)接入你的路由器.接好后进入路由器WEB管理页面(路由器的说明书上会告你如何进入),在WAN选项中填入你的上网帐号和密码就可以了
2.如果你家是宽带上网,那接口就是RJ45的口,直接插在路由器的WAN口上就行了,无需调制解调器,设置方法同上,进入路由器WEB页面.....
所谓调制解调器就是你家的宽带猫
物理接线>电话进户线>信号分离器>信号分离器出两根电话线 photo接电话 modem接宽带猫>路由的wan口 lan口出线插电脑网卡
然后按路由说明书登陆你的路由将你原来的拨号信息设置到你路由里去 一般是点快速设置或设置向导什么的 开启DHCP服务 OK
开机就在网上 无需再拨号 可以短信我
你PPPOE用户不需要拨号吗 应该有一个宽带猫的呀 如果你是光纤进小区个人直接外线就拨号的话（类似于校园网）那只有共享连接来上网了
你应该是有宽带猫的 就是营运商提供给你那个
反过来解答 你的另一个问题 是说的以前的56K插在PCI接口上的猫
如果你用电话线上网必须要用到调制解调器
简单的说是因为路由器不具备调制解调器的功能
他们属于不同的两个组件 这样说楼主明白了么？
楼主问这些的主要目的是什么呢，是现在没有上网？想上网？还是？
一般来说 你交钱上网 由电信部门都是送猫的 不用专门的去买 所以楼主完全不用考虑这些啦。。
调制解调器就是所谓的猫
现在一般台式电脑都不会配置调制解调器了。
你使用宽带的话一般服务商都会提供调制解调器的，你可以打电话咨询下。
简单来讲就是，你电话的接口插调制解调器，调制解调器上还有一个网口跟你的路由器连接的，在路由内再设置你宽带的的帐户和密码。
你家是哪种宽带上网？是通过电话线，还是网线直接接进来的？
我是学网络管理的。其调制解调器和路由器是不一样的。调制解调器俗称hub，它的功能是连接多个电脑的从而形成局域网（当然了这个调制解调器要有多个接口）。而路由器是用来连接网络（互联网）的。这是最大的差别。现在有个叫第三层交换机的设备，它具备了以上两种设备的功能，所以你想买的话，建议买个第三层交换机。相对来说比路由器要便宜的多，但稍微比hub要贵一点。
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