A modem on the other end of the line can understand it and convert the sounds back into digital information that the computer can understand. Modulation is the conversion of data from binary to analog and demodulation is the reverse process. So when you send a file from your PC to another, it is converted to an analog signal by your modem and converted back to binary when it arrives at the destination by the modem connected to that computer. Most modems today are capable of sending and receiving faxes. These modems are called Fax-Modems.
Most manufactures supply the software for their modems.
Windows 95 has its own modem utilities including utilities for sending and receiving faxes. But modems with transfer rates of 28.8Kbps, 33.6 Kbps and 56 Kbps are now available in the market. Slower modems will be frustratingly slow when accessing many of the multimedia enabled and virtual reality sites. Faster data transfer speeds means less time spend on the Internet and lower telephone bills. Once you have decided on the transfer speed and manufacturer, then the next question is whether to go in for an external modem or an internal one.