这些协议主要是为通过交换网(switched circuits)或者拨号线(dial-up lines)连接到PPP 网络服务器的主机和路由器服务的,但是也可以被用到专用链路(dedicated links)中。
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This reduces the cost of remote access and offers greater security than is possible over dial-up lines.
这就降低了远地访问的成本,提供了比在 拨号 线上更大的安全性。
Back then, in 2000, fans started asking for a downloadable version, because everyone was still using dial-up modems and didn't want to tie up their phone lines.
到了2000年,粉丝们开始要求一个可以下载的版本,因为当时所有人都在使用拨号调制解调器上网,而且不想占用电话线。
Connect the RS232 output directly to the serial port on your PC or Laptop, or by dial-up connection through modems and phone lines.
连接rs232输出直接向您的PC或笔记本电脑,或通过拨号调制解调器和电话线连接的串行端口。
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