In this infrastructure, dial-up connections will always be established from the client computer to the server computer and never the other way around. The main purpose of a client computer to establish a dial-up connection with the server computer will be to use one or more internet services provided in the server computer through the telphone line. In order for the server computer to answer telephone calls, it is required to install a Modem device in it (see ). Once the Modem device has been installed, you need to install and configure both mgetty and pppd programs. The mgetty program must be run by init daemon in order to take control over the Modem device. By default, inside &TCD; (release 5.5), mgetty isn't configured to start with init daemon so you need to do it yourself (see ...). Later, for attending connection requests, you need to configure mgetty to use the pppd program, so the Point-to-Point Protocol (PPP) can be talked and IP packages can be interchanged between the client computer and the server computer. Later, you need to configure pppd to adjust it to your needs (see ...). Once you've configured both mgetty and pppd programs, the server computer should be ready to attend incoming calls. The remaining of this chapter describes the way incoming calls are attended by the server computer once they have arrived to its Modem device.