This part of the syllabus states
"Describe the use of telecommunication and information technology in telephone systems, banking, production control, global positioning systems, navigation and weather forecasting"
This is quite a diverse mix of topics as the aim is for you to understand how ICT relates to various parts of society.
We have split this syllabus point into a number of small mini-webs that cover one aspect of the subject.
This mini-web covers telephone systems.