Why use a digital system rather than an analoge system?
Because digital technology gives extremely reliable operation and the technology is almost infinitely extendable without causing backward compatibility problems (analoge systems are inherently more restrictive). Also, digital systems make wiring simple and easy to install. Because a digital system encodes information sent from the command station to the decoder as numbers grouped into packets, new types of packets can be added to a digital system to send more information thus extending the existing system without causing backward compatibility problems.
