3.2 Looking into the 'means of conveying a message'
The diagram in Figure 6 shows that, for communication to take place, there needs to be some means of conveying the message between the sender and the recipient. I am now going to look at the essential components of 'means of conveying a message'. In other words, I shall treat 'means of conveying a message' as a system and look at its components.
Three essential components of 'means of conveying a message are: a transmitter, a network and a receiver. Figure 7 shows these components in a block diagram. In a mobile phone system, for example, the 'transmitter' would be User l's mobile phone, the 'network' would be the mobile telephone network and the 'receiver' would be User 2's mobile phone.