Why is ISDN better than a standard (analog) line with a modem?
If you transmit very large data files, ISDN provides speed and capacity that may not be possible over an analog line, regardless of the modem speed. For example, video conferencing is difficult over an analog line, but is close to full motion over ISDN. Some terminal adapters have the capability to use both of the two 64 kbps channels to allow you to communicate at 128 kbps. ISDN is an end to end digital connection which provides cleaner data and clearer voice. Analog telephone sets convert the sound waves of your voice to analog electrical waves (analog transmission). ISDN sets convert your voice into voltages representing a string of 0s and 1s (digital transmission), similar to those on a compact disc recording. In both cases, these converted electrical signals are sent over the telephone network. However, as an analog transmission travels through the telephone network, it can pick up noise from power lines, moisture in telephone cables, lightning, or cross talk from other lines. The
