Remote Access
Remote Access Dial-Up Connectivity
Analog Dial-Up Connections

The Public Switched Telephone Network (PSTN),
- also known as the Plain Old Telephone System (POTS),
- is designed to carry human voices from one phone to another as an analog signal.
Read more about the Public Switched Telephone Network (PSTN) at:
http://communication.howstuffworks.com/telephone-country-codes1.htm.
An analog dial-up modem converts the computer's digital information into an analog form that is compatible with delivery over the PSTN.
The main disadvantage of analog dial-up is that it is slow, transferring below 100,000 bits of data per second.
The remote access server must have one modem per dial-up client that is connected at the same time. Each modem requires a separate phone line.
The following are requirements to configure dial-up networking in Windows 7:

Analog dial-up modems must be installed and their supporting hardware driver must be fully functional before any other configuration steps are performed.
Windows 7 can control the dialing process based on where a user and computer are physically located by using dialing profiles. You must define at least one location-based dialing profile. Dialing rules are defined through the Phone and Modem Options Control Panel applet.
Creating a connection to a remote access server requires the phone number and usually a username and password. You must activate the Set up a connection or network wizard. The remote access server's dialing information must be known.
The steps to review the dial-up connection properties are: