1. Topic 6: Customer Switching Systems (CSS)
This topic will give you an
overview of CSS principles.

2. Overview
Switch speech
Video
Data
Other Information

3. The Evolution of switching system technology
Manual Switches

4. The Evolution of switching system technology
Manual Switches
Step by Step (SXS)

5. The Evolution of switching system technology
Manual Switches
Step by Step (SXS)
Cross Bar
Common control equipment reacts to incoming call
-> -> collects dialed digits -> -> analyses them-> ->
sets up call -> -> drops out to deal with others.