At the other end of the long-distance cable, the individual signals are separated out by means of a circuit called a demultiplexer, and routed to the proper end users. Analog systems handle information which is represented by continuos change and flow, such as voltage or current. Analog devices have dials and sliding mechanisms. Digital information, in contrast, is in discrete states. This will be covered in a later lecture.
High bandwidth allows fast transmission or high-volume transmission.
Can carry either analog or digital signals. Requires no timing synchronization between signals. Relatively inexpensive for low density transmission. Group delay of frequency selective filters can increase bit error rate. N. American and Intl.