motivation

WHAT IS ISDN
ISDN (Integrated Services Digital Network) is an all-digital communications network designed to bring the power of the digital network directly to the desktop. ISDN, or Integrated Services Digital Network, is a suite of internationally-adopted standards for end-to-end digital communication over the public telephone network. As this network has been traditionally oriented towards voice services, ISDN is an important step forward in the adaptation of the network to handle the increasing global demand for computer-to-computer data communications. ISDN brings us closer to the goal of a ubiquitous multi-service network, integrating voice, data, video and image services in a digital format over a common, global network. ISDN is as easy to use as analog but offers much more. For example, you can utilize the two 64 kbps B channels as individual voice and data lines at the same time. You can use one channel to talk while you're using the second to send data files. Or...