How to Hook up PPP in Linux，pppd详细使用说明-How to Hook up PPP in Linux, detailed use pppd

l2tpd is an implementation of the layer two tunneling protocol. It works in userspace completely (although kernel work is planned after the userspace version is stablized). l2tpd works by opening a pseudo-tty for communicating with pppd. Althou

wvdial 软件包是一个自动拨号程序，相当于包含了一个有意义的快速和简单使用的另类的chat和pppd脚本。本软件包用在本机linux系统上.-wvdial package is an automatic dial-up procedure, which is equivalent to include a meaningful fast and simple alternative to use chat scr ipt and pppd. The package used in the l

tty.c - code for handling serial ports in pppd for Linux v2.13.6.