e853c34c__and_Educational_Standards_NSW__Students_learn_to_
[Students learn about:] other information processes in communication systems collecting, such as: the phone as the collection device with voice mail EFTPOS terminal as a collection device for electronic banking processing, including: encoding and decoding analog and digital signals formation of data packets routing encryption and decryption error checking parity bit check check sum cyclic redundancy check (CRC) displaying, such as the phone as the display device with voice mail EFTPOS terminal as a display device for electronic banking [Students learn to:] 
distinguish between data in analog and digital form justify the need to encode and decode data identify where in a communication system signal conversion takes place describe the structure of a data packet describe methods to check the accuracy of data being transmitted
9.3 Communication Systems - Board of Studies Teaching and Educational Standards NSW
Students learn to: