As its name implies, a telecommunication system is first a communication system, that is, a system to transmit information from one location to another. And secondly, a system that allows you to transmit information from locations with a considerable distance between them. That’s what the prefix tele means in greek = distant.
As in any communication system, it’s composed by 3 parts:
- The transmitter
- The channel
- The receiver
and it can be analog and digital.